US Population Over 18 in 2025 | Statistics & Facts

Population in US Over 18 in 2024-2025

The American demographic landscape continues to evolve dramatically as the nation witnesses unprecedented shifts in its adult population composition. As we transition from 2024 into 2025, the United States stands at a pivotal demographic crossroads where the adult population over 18 years represents a larger proportion of the total population than at any point in recent history. With the total US population reaching 340.1 million people in 2024, understanding the dynamics of the adult demographic becomes increasingly critical for policymakers, businesses, healthcare providers, and community planners who must adapt to these transformative changes.

The year 2024 marked a significant demographic milestone as the country experienced its highest population growth rate in over two decades, expanding by nearly 1.0% year-over-year. This remarkable growth, driven primarily by net international migration rather than natural increase, has fundamentally altered the composition of American society. The adult population aged 18 and over now comprises approximately 78.5% of the total population, translating to roughly 267 million adults across the nation. This substantial adult majority reflects broader demographic trends including an aging Baby Boomer generation, declining birth rates that have hovered near historic lows, and shifting household compositions that favor smaller family units and single-person households. These transformations carry profound implications for workforce participation, healthcare infrastructure, Social Security sustainability, housing markets, and consumer spending patterns that will define America’s economic trajectory through 2025 and beyond.

Key Stats & Facts About US Population Over 18 in 2025

Data Source: U.S. Census Bureau Vintage 2024 Population Estimates (July 1, 2024); CDC Provisional Mortality and Natality Data 2024

Understanding the Adult Population Growth Trends Over 18

The demographics of American adults underwent remarkable transformation throughout 2024, revealing patterns that challenge conventional assumptions about population growth and composition. The most striking revelation from Census Bureau data shows that the adult population over 18 expanded significantly while the under-18 population continued its decade-long decline. This divergence between age groups signals a fundamental restructuring of American society that extends far beyond simple numerical changes affecting the 267 million adults living across the United States as of July 2024.

The working-age segment between 18 and 64 years constitutes approximately 205.8 million individuals, forming the economic backbone that drives productivity, innovation, and tax revenue generation. Meanwhile, the rapidly expanding cohort of Americans aged 65 and older reached 61.2 million, marking a 3.1% increase from the previous year and continuing an unrelenting upward trajectory that has seen this group grow from just 12.4% of the population in 2004 to 18.0% in 2024. The birth rate remained near historic lows at 1,080 births per 100,000 people in 2024, representing only a marginal increase from 2023’s record-low figure of 1,074 births per 100,000. Simultaneously, the death rate decreased to 917.3 deaths per 100,000 people, marking the third consecutive annual decline but remaining elevated above pre-pandemic baseline levels. These twin demographic forces have fundamentally altered the equation of natural population increase, leaving international migration as the dominant driver of growth affecting the adult population over 18 years.

Age Distribution of US Adult Population Over 18 in 2025

Data Source: U.S. Census Bureau Vintage 2024 Population Estimates by Age and Sex (July 1, 2024)

The age stratification within America’s adult population over 18 reveals fascinating generational dynamics that shape economic, political, and social outcomes across the nation. The young adult cohort aged 18-24, comprising approximately 30.5 million individuals, represents the newest entrants into voting, workforce participation, and independent household formation. This demographic segment, while relatively stable in absolute numbers, faces unique challenges including student debt burdens, competitive entry-level job markets, and delayed family formation patterns compared to previous generations who entered adulthood decades earlier.

The millennial generation, now firmly established in their peak earning years between ages 25-44, constitutes a formidable demographic force totaling approximately 90.9 million adults or 26.7% of the entire population and 34.0% of all adults over 18. This cohort’s economic power, digital fluency, and progressive social values continue reshaping consumer markets, workplace cultures, and political landscapes. The Generation X adults aged 45-54 number approximately 40.8 million and represent a pivotal bridge generation between Baby Boomers and Millennials. The late Baby Boomer and early Generation X cohort aged 55-64, totaling approximately 43.6 million, approaches traditional retirement age while many continue working longer than previous generations. The most dramatic growth occurs within the senior population segments aged 65 and over, which collectively expanded to 61.2 million in 2024. The 65-74 age group represents Baby Boomers in their early retirement years, while the 75 and over population of approximately 25.8 million comprises the fastest-growing age segment in absolute and percentage terms among all adults over 18 years.

Gender Distribution of US Adults Over 18 in 2025

Data Source: U.S. Census Bureau Vintage 2024 Population Estimates by Age and Sex (July 1, 2024)

Gender distribution patterns within the American adult population over 18 reflect the persistent biological reality of differential longevity combined with evolving social dynamics around gender roles and economic participation. The adult male population of approximately 131.5 million represents slightly less than half of all adults aged 18 and over, a pattern that becomes more pronounced in older age brackets where male mortality rates historically exceed female rates. Conversely, the adult female population of approximately 135.5 million maintains a modest numerical advantage that grows substantially among elderly cohorts within the 267 million total adults over 18.

Within the crucial working-age population between 18 and 64 years, gender distribution remains remarkably balanced with males comprising approximately 102.1 million and females totaling approximately 103.7 million of the 205.8 million working-age adults. This near parity reflects contemporary social realities where both genders participate actively in workforce, educational, and economic spheres. The gender gap becomes most apparent within the elderly population aged 65 and over, where biological longevity advantages favor females significantly. Female seniors number approximately 31.8 million compared to 29.4 million male seniors, creating a 52.0% female majority within this age cohort of adults over 18. This disparity intensifies dramatically in the oldest age brackets where women substantially outnumber men due to cumulative mortality differences across the lifespan, significantly affecting the overall composition of the US adult population over 18 years.

Racial and Ethnic Composition of US Adults Over 18 in 2025

Data Source: U.S. Census Bureau Vintage 2024 Population Estimates by Race and Hispanic Origin (June 2025 Release)

America’s increasing racial and ethnic diversity represents one of the most profound demographic transformations reshaping the adult population over 18 across the national landscape. The white non-Hispanic adult population, while remaining the largest single demographic group at approximately 157.8 million adults over 18, has entered a period of absolute decline, decreasing by 0.1% between 2023 and 2024. This marks a continuation of trends that have dramatically altered the composition of US adults over 18, with white non-Hispanics shrinking from 76% of the population in 1990 to just 57.5% in 2024 among all Americans, representing an even more dramatic shift within the adult population aged 18 and over.

The Hispanic or Latino adult population has emerged as the primary driver of growth and diversification among adults over 18, with approximately 46.2 million Hispanic adults in 2024 after expanding by an impressive 2.9% year-over-year. Hispanics now constitute 20.0% of the total US population, and their representation within the adult population over 18 years continues growing rapidly through both sustained immigration and aging of younger Hispanic cohorts into adulthood. Hispanic adults now represent a decisive electoral force, significant consumer market, and essential workforce component across virtually every American industry affecting the broader 267 million adults over 18.

The Asian adult population demonstrated the fastest percentage growth rate of any major racial group among adults over 18, with approximately 16.8 million Asian adults aged 18 and over in 2024, expanding by 4.2% annually. The Black or African American adult population of approximately 33.2 million adults over 18 grew steadily by 1.0%, maintaining its position as a significant demographic force within the US adult population over 18 years. Meanwhile, the multiracial adult population of approximately 5.9 million adults aged 18 and over continued its dramatic expansion, growing 2.7% and reflecting the increasingly fluid nature of racial categorization within the adult population over 18 across America.

Educational Attainment Among US Adults Over 25 in 2025

Data Source: U.S. Census Bureau American Community Survey estimates applied to 2024 adult population (adults 25 and over)

Educational attainment levels among the US adult population over 25 years have risen dramatically over recent decades, fundamentally reshaping workforce capabilities, earning potential, and economic mobility pathways for adults over 18. The adult population aged 25 and over, totaling approximately 209.5 million in 2024, demonstrates significant educational diversity that correlates strongly with employment outcomes, income levels, and geographic distribution patterns affecting the broader 267 million adults over 18 across America.

Adults over 25 with bachelor’s degrees or higher now represent approximately 34.2% of the 25-and-over population, totaling roughly 71.7 million individuals within the adult population over 18. This represents a remarkable transformation from previous generations when college education remained relatively elite and inaccessible to most American adults. The 47.3 million adults holding bachelor’s degrees form the backbone of professional occupations, while the 24.4 million adults possessing graduate or professional degrees occupy the apex of American educational attainment among adults over 18. Despite educational progress, approximately 21.4 million adults lack high school diplomas, representing 10.2% of the 25-and-over population within the broader adult population over 18 years. The middle tier of educational attainment encompasses high school graduates, those with some college but no degree, and associate’s degree holders, collectively representing approximately 116.4 million adults or 55.5% of the 25-and-over population, forming essential infrastructure within the US adult population over 18 that drives American economic life.

Geographic Distribution of US Adults Over 18 by State in 2025

Data Source: U.S. Census Bureau Vintage 2024 State Population Estimates (July 1, 2024)

Geographic distribution of the US adult population over 18 reveals stark regional disparities in growth trajectories, economic opportunities, and demographic compositions affecting the 267 million adults across America. The Sun Belt states – particularly Florida, Texas, Georgia, North Carolina, and Arizona – have emerged as dominant growth engines, attracting millions of adults over 18 through domestic migration from high-cost Northeastern and West Coast metropolitan areas while simultaneously drawing international immigrants seeking economic opportunity.

Florida’s explosive 2.0% growth rate propelled its adult population over 18 to approximately 19.2 million in 2024, solidifying its position as a magnet for adults aged 18 and over from across the nation. The Sunshine State’s appeal spans multiple segments of the adult population over 18: retirees seeking warm weather, young families pursuing affordable housing, remote workers leveraging geographic flexibility, and entrepreneurs establishing businesses. Texas maintained robust growth with approximately 23.4 million adults over 18, growing at 1.8% annually, making it irresistible to adults aged 18 and over seeking opportunity. In contrast, traditional population centers across the Midwest and Northeast face demographic stagnation affecting their adult populations over 18. Illinois experienced slight decline in its adult population, while Ohio and Pennsylvania posted near-zero growth rates among adults over 18, struggling to retain young adults who increasingly migrate to faster-growing regions. California, despite having approximately 31.0 million adults over 18, has experienced dramatically slowed growth of just 0.2% annually, with domestic outmigration particularly among middle-class adults over 18 seeking more affordable alternatives.

Employment Status of US Adults Aged 18-64 in 2025

Data Source: U.S. Bureau of Labor Statistics Current Population Survey estimates applied to 2024 Census adult population data

Employment patterns among working-age adults over 18 (specifically ages 18-64) reflect both cyclical economic conditions and structural labor market transformations reshaping how American adults earn livelihoods. The labor force participation rate of approximately 77.0% among adults aged 18-64 represents a partial recovery from pandemic-era lows but remains below pre-2008 financial crisis levels, indicating persistent structural barriers preventing millions of capable adults over 18 from engaging in paid employment.

The 124.5 million adults employed full-time form the economic foundation generating tax revenues, consumer spending, innovation, and productivity growth sustaining American prosperity among the 205.8 million working-age adults over 18. Part-time employment, encompassing approximately 27.8 million adults, serves diverse purposes for adults aged 18-64 ranging from supplemental income to primary employment for those unable to secure full-time positions. The 47.3 million working-age adults not participating in the labor force represent a complex demographic within the adult population over 18, including full-time students pursuing educational credentials, stay-at-home parents providing unpaid caregiving labor, disabled individuals unable to work, early retirees, and discouraged workers who ceased job searching. The self-employed population of approximately 16.4 million adults encompasses traditional small business owners, independent contractors, freelancers, and gig economy participants among adults over 18, leveraging platforms and technology enabling flexible work arrangements for the modern adult workforce over 18 years.

Household Composition of Adults Over 18 in 2025

Data Source: U.S. Census Bureau American Community Survey and Historical Household Tables applied to 2024 estimates

American household structures have undergone revolutionary transformation affecting how adults over 18 live and organize their domestic arrangements. The 130.6 million households enumerated in 2024 reflect evolving social norms, economic pressures, delayed marriage and childbearing among adults over 18, rising divorce rates, increased longevity, and changing attitudes toward cohabitation and independence among the 267 million adults aged 18 and over.

Single-person households have emerged as one of the dominant household types, numbering approximately 38.0 million or 29.1% of all households, representing 38 million adults over 18 living alone. This represents a dramatic increase from just 17% in 1970, reflecting multiple demographic forces affecting adults aged 18 and over including delayed marriage among young adults, high divorce rates creating single-person households among middle-aged adults, and elderly widows and widowers living alone. Married couples without children constitute another major household category at 38.4 million or 29.4% of all households, representing approximately 76.8 million adults over 18 living in these arrangements and outnumbering married couples with children. The decline of married-parent households represents one of the most consequential demographic shifts reshaping how adults over 18 structure family life. Married couples with children now comprise just 17.7% of all households, representing approximately 46.2 million adults aged 18 and over in these family structures. Single-parent households, numbering approximately 9.8 million households with approximately 9.8 million adults over 18 heading these families, face distinctive economic pressures as lone adults manage both childcare responsibilities and income generation without spousal support.

Health Insurance Coverage Among US Adults Over 18 in 2025

Data Source: U.S. Census Bureau American Community Survey health insurance coverage estimates applied to 2024 adult population (Note: individuals may have multiple coverage types)

Health insurance coverage patterns among the US adult population over 18 reflect the complex patchwork of public programs, employer-based benefits, individual markets, and persistent coverage gaps characterizing healthcare access for 267 million adults aged 18 and over. Despite expansions under the Affordable Care Act and various state-level reforms, approximately 25.4 million adults or 9.5% of the adult population over 18 remained uninsured in 2024, creating barriers to preventive care, acute treatment, and chronic disease management for these adults over 18.

Employer-sponsored insurance remains the dominant coverage source, providing health benefits to approximately 152.0 million adults or 56.9% of the adult population over 18 through workplace-based plans. Medicare, the federal insurance program for Americans aged 65 and older plus certain disabled individuals, covered approximately 65.8 million adults in 2024, representing 24.6% of the adult population over 18. Medicare’s importance continues expanding as the Baby Boomer generation ages into eligibility among adults over 18, with enrollment projected to surge through 2030. Medicaid and CHIP, the joint federal-state programs, extended health insurance to approximately 45.7 million adults or 17.1% of the adult population over 18. The uninsured adult population of approximately 25.4 million adults over 18 faces severe healthcare access barriers including delayed or foregone preventive care, reliance on emergency rooms for primary care needs, and medical debt that devastates family finances for these adults aged 18 and over who lack coverage.

Voting Eligible Adults Over 18 in 2025 Presidential Election Year

Data Source: U.S. Census Bureau Current Population Survey Voting and Registration Supplement estimates applied to 2024 adult population

The 2024 presidential election year focused intense attention on America’s voting eligible adult population over 18 of approximately 244.7 million adults, representing 91.6% of the total adult population aged 18 and over. This massive democratic franchise among adults over 18 determines political leadership, policy directions, and national priorities through electoral participation, though significant gaps persist between eligibility, registration, and actual voting among the 267 million adults over 18.

Voter registration presents the first major barrier for adults over 18, with approximately 168.3 million adults or 68.8% of eligible adult voters over 18 successfully navigating registration requirements as of 2024. The 76.4 million eligible but unregistered adults over 18 represent an enormous untapped democratic potential whose engagement could dramatically shift electoral outcomes. Actual voter turnout in presidential elections typically hovers around 60-65% of eligible adults over 18, with the 2024 election projected to bring approximately 155.0 million adults aged 18 and over to polls or mail-in voting. This means roughly 89.7 million eligible adults over 18 likely abstained from the 2024 presidential election despite eligibility. The approximately 22.3 million non-citizen adults residing in the United States, representing 8.4% of the adult population over 18, remain ineligible to vote despite often having deep stakes in policy outcomes. Felony disenfranchisement affects approximately 4.4 million adults or 1.6% of the adult population over 18, varying dramatically by state laws. The approximately 8.3 million first-time eligible voters who reached age 18 since the 2020 election represent crucial emerging electoral power among young adults over 18 entering the democratic process.

Military Service and Veteran Status Among US Adults Over 18 in 2025

Data Source: U.S. Department of Veterans Affairs, Department of Defense, and Census Bureau American Community Survey estimates applied to 2024 adult population

American adults over 18 with military service experience represent a small but significant segment of the 267 million adult population with unique healthcare needs, employment challenges, and civic contributions. The approximately 1.3 million active duty service members and 800,000 reserve/National Guard personnel, totaling roughly 2.1 million or 0.8% of the adult population over 18, comprise America’s all-volunteer military force defending national interests, exclusively drawn from adults aged 18 and over.

The veteran population of approximately 18.2 million adults or 6.8% of the adult population over 18 includes individuals who served in conflicts ranging from World War II through recent operations in Iraq and Afghanistan. This veteran segment of adults over 18 has declined substantially from peaks exceeding 26 million in the 1980s as World War II and Korean War veterans age and pass away. The veteran population increasingly concentrates among older adults over 18, with approximately 9.1 million veterans aged 65 and older representing 50% of all veteran adults. Post-9/11 veterans, numbering approximately 5.6 million or 30.8% of all veteran adults over 18, represent the newest cohort of adults aged 18 and over returning from extended military operations. Female veterans, approximately 2.0 million strong representing 11% of all veteran adults over 18, constitute the fastest-growing veteran demographic among adults aged 18 and over as military roles expanded to include women in combat positions.

Disability Status Among US Adults Over 18 in 2025

Data Source: U.S. Census Bureau American Community Survey Disability Characteristics estimates applied to 2024 adult population (Note: individuals may report multiple disability types)

Disability among the US adult population over 18 affects approximately 42.5 million individuals or 15.9% of all adults aged 18 and over, encompassing diverse conditions that impact mobility, cognition, independent living, sensory perception, and self-care capabilities for these adults over 18. Disability prevalence increases dramatically with age among adults over 18, with rates exceeding 35% among adults aged 65 and older compared to less than 10% among adults under 35, reflecting accumulation of chronic conditions, injuries, and age-related functional declines affecting the 267 million adults over 18 in America.

Ambulatory difficulties affecting approximately 22.4 million adults or 8.4% of the adult population over 18 represent the most common disability category among adults aged 18 and over, including individuals with serious difficulty walking or climbing stairs. Cognitive difficulties, reported by approximately 16.0 million adults or 6.0% of the adult population over 18, encompass serious difficulty concentrating, remembering, or making decisions affecting these adults over 18. Independent living difficulties and self-care difficulties, affecting approximately 15.5 million and 10.1 million adults over 18 respectively, represent the most severe functional limitations preventing adults aged 18 and over from living independently or performing basic personal care tasks. Sensory disabilities including hearing difficulties (approximately 14.7 million adults or 5.5%) and vision difficulties (approximately 10.7 million adults or 4.0%) create communication barriers, safety risks, and social isolation for these adults over 18. The growing elderly population with multiple chronic conditions will dramatically expand disability prevalence among the adult population over 18, straining family caregivers and healthcare infrastructure serving adults aged 18 and over.

Religious Affiliation Among US Adults Over 18 in 2025

Data Source: Pew Research Center Religious Landscape Studies and American Community Survey estimates applied to 2024 adult population

Religious affiliation patterns among the US adult population over 18 have undergone dramatic transformation over recent decades, with traditional Christian denominations experiencing sustained decline while religious unaffiliation surges, particularly among younger adults aged 18 and over. The Christian adult population, encompassing all denominations including Protestant, Catholic, Orthodox, and other traditions, has declined from over 78% of adults in 2000 to approximately 65.0% or 173.6 million adults over 18 in 2024, representing a seismic shift in the religious landscape of American adults aged 18 and over.

Protestant Christian adults, once the overwhelming religious majority among adults over 18, now comprise approximately 40.0% or 106.8 million adults aged 18 and over, down dramatically from over 60% in the 1970s. This decline among the adult population over 18 spans both mainline Protestant denominations experiencing steep membership losses and evangelical Protestant traditions that previously grew but now face stagnation among adults over 18. Catholic adults number approximately 53.4 million or 20.0% of the adult population over 18, maintaining relatively stable proportions among adults aged 18 and over through combination of immigrant growth offsetting defections. The religiously unaffiliated adult population, often called “nones,” has exploded to approximately 77.2 million adults or 28.9% of the adult population over 18, up from less than 10% in 1990 among adults aged 18 and over. This diverse category of adults over 18 includes atheists, agnostics, and those who describe their religion as “nothing in particular.” Religious unaffiliation concentrates heavily among younger adults over 18, with approximately 40% of adults under 30 identifying as religiously unaffiliated compared to less than 20% of adults over 65, suggesting continued growth among the adult population over 18 as generational replacement proceeds. Non-Christian religious minorities collectively represent approximately 6.5% or 17.4 million adults over 18, including Jewish adults (approximately 5.3 million), Muslim adults (approximately 3.7 million), and Hindu adults (approximately 2.4 million) representing the fastest-growing religious minorities among the US adult population over 18 years.

Marital Status of US Adults Over 18 in 2025

Data Source: U.S. Census Bureau American Community Survey and Current Population Survey estimates applied to 2024 adult population

Marital status patterns among the US adult population over 18 have undergone profound transformation, reflecting delayed marriage, rising divorce rates, increased cohabitation, and changing social norms affecting the 267 million adults aged 18 and over. The married adult population of approximately 133.5 million or 50.0% of adults over 18 marks a historic low point where married adults no longer constitute a clear majority of the adult population over 18 for the first time in American history, representing a dramatic shift from 1960 when over 70% of adults over 18 were married.

The never-married adult population has surged to approximately 85.4 million or 32.0% of adults over 18, more than doubling from just 15% in 1960 among adults aged 18 and over. This explosive growth among adults over 18 reflects multiple demographic forces including delayed age at first marriage (now averaging 30 for men and 28 for women compared to 23 and 20 in 1960), increased acceptance of remaining single, economic barriers to marriage, educational pursuits, and preference for cohabitation without legal marriage among younger adults over 18. The divorced adult population of approximately 29.4 million or 11.0% of adults over 18 reflects America’s elevated divorce rates, with approximately 40-50% of first marriages ending in divorce affecting millions of adults aged 18 and over. The widowed adult population of approximately 18.7 million or 7.0% of adults over 18 concentrates heavily among elderly adults, particularly women who typically outlive husbands by several years, creating a substantial population of elderly widows within the adult population over 18. Cohabiting unmarried partners, numbering approximately 18.7 million adults or 7.0% of the adult population over 18, represent a rapidly growing alternative to traditional marriage among adults aged 18 and over, particularly common among younger adults who view cohabitation as either a precursor to marriage or a permanent alternative to legal marriage.

Language Spoken at Home by US Adults Over 18 in 2025

Data Source: U.S. Census Bureau American Community Survey Language Spoken at Home estimates applied to 2024 adult population

Language diversity among the US adult population over 18 reflects America’s immigrant heritage and continuing linguistic pluralism affecting the 267 million adults aged 18 and over. The English-only adult population of approximately 213.6 million or 80.0% of adults over 18 remains the dominant linguistic group, though this proportion has declined from over 90% in 1980 as immigration diversified the linguistic landscape of adults aged 18 and over across America.

Spanish-speaking adults at home number approximately 40.0 million or 15.0% of the adult population over 18, making Spanish by far the most common non-English language among adults aged 18 and over in the United States. This Spanish-speaking adult population over 18 reflects both recent Hispanic immigration and multi-generational Hispanic American families who maintain Spanish language use in domestic settings despite English proficiency. The growth of Spanish-speaking adults over 18 has transformed education systems, business practices, media landscapes, and political campaigns that increasingly must engage this substantial linguistic community within the adult population over 18. Asian language speakers collectively represent a significant and growing segment of adults over 18, with Chinese-speaking adults (approximately 3.7 million), Tagalog-speaking adults (approximately 1.9 million), Vietnamese-speaking adults (approximately 1.6 million), and Korean-speaking adults (approximately 1.1 million) comprising major Asian linguistic communities among the adult population over 18. Arabic-speaking and French-speaking adults, each numbering approximately 1.3 million adults over 18, represent growing Middle Eastern and African immigrant communities plus historical French-speaking populations in Louisiana and along northern borders affecting the linguistic diversity of the US adult population over 18 years.

The American adult population over 18 stands at a critical demographic inflection point as 2024 transitions into 2025, with powerful forces reshaping the size, composition, and distribution of adults aged 18 and over in ways that will reverberate for decades. Population projections for 2025 suggest the adult population over 18 will expand to approximately 269-270 million, maintaining the approximate 78.5-79.0% adult share as the under-18 population continues gradual decline while working-age and elderly adults over 18 expand. The most consequential demographic trend shaping the US adult population over 18 remains the accelerating aging as Baby Boomers continue transitioning fully into retirement years among adults over 18. By 2030, all Baby Boomers will have reached age 65 or older, pushing the elderly adult population 65+ toward 75 million or approximately 21-22% of the total population, dramatically increasing the proportion of senior adults over 18 within the overall adult population aged 18 and over.

International migration will remain the dominant driver of adult population over 18 growth through 2025 and beyond, accounting for the vast majority of increase among adults aged 18 and over as natural increase from births minus deaths hovers near zero or potentially turns negative. Current migration trends suggest net international migration could reach 2.5-3.0 million annually through 2025, with most immigrants being adults over 18 who will directly add to the adult population aged 18 and over. The increasingly diverse adult population over 18 resulting from sustained immigration will continue transforming American culture, politics, and identity, though not without friction in some communities experiencing rapid demographic change among adults aged 18 and over. Geographic redistribution will persist with Sun Belt states continuing to attract adults over 18 through domestic migration from expensive coastal and Rust Belt regions while simultaneously drawing international immigrant adults aged 18 and over. Florida and Texas will continue rapid growth in their adult populations over 18 potentially exceeding 2% annually, while Northeastern and Midwestern states face potential stagnation or decline in adult populations aged 18 and over absent economic revival. The working-age adult population between 18-64 faces complex challenges including automation displacing routine jobs, artificial intelligence disrupting professional occupations, and gig economy expansion fragmenting traditional employment affecting how adults over 18 earn livelihoods and build economic security throughout 2025 and beyond.

Disclaimer: This research report is compiled from publicly available sources. While reasonable efforts have been made to ensure accuracy, no representation or warranty, express or implied, is given as to the completeness or reliability of the information. We accept no liability for any errors, omissions, losses, or damages of any kind arising from the use of this report.

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