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🇺🇸AP US History Unit 9 Review

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9.5 Migration and Immigration

🇺🇸AP US History
Unit 9 Review

9.5 Migration and Immigration

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025
🇺🇸AP US History
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Since 1980, the United States has experienced significant shifts in where people live and who makes up the American population. Americans increasingly moved to southern and western states, while new waves of immigrants changed the nation's cultural and ethnic makeup. These migration patterns transformed American politics, culture, and society in profound ways.

The Rise of the Sunbelt

Americans increasingly moved to the South and West, creating what became known as the "Sunbelt" - an arc stretching from California through the Southwest and Texas to Florida. This population shift changed the balance of economic and political power in the United States.

The Sunbelt's growth began during World War II when defense industries and military bases expanded in these regions. After the war, this trend accelerated for several reasons: new job opportunities, more affordable housing, warmer climate, and improvements like air conditioning that made hot regions more comfortable.

  • Reasons for Sunbelt Growth:
    • Aerospace and defense industries in California, Florida, and Texas
    • Technology companies in Silicon Valley and Texas
    • Manufacturing moved from Northeast to Southern states for cheaper labor
    • Air conditioning made hot climates more livable
    • Lower taxes and less regulation in many Southern states
    • More affordable housing compared to Northeast and West Coast
  • Effects of the Sunbelt Shift:
    • Rust Belt states lost population and electoral votes
    • Florida, Texas, and California gained political influence
    • Southern cultural influence increased (country music, NASCAR)
    • Environmental challenges from rapid development
    • Water shortages in growing desert communities
StateElectoral Votes 1980Electoral Votes 2020Change
California4555+10
Texas2638+12
Florida1729+12
New York4129-12
Pennsylvania2719-8
Ohio2517-8

Changing Immigration Patterns

The 1980s through 2000s saw significant changes in immigration to the United States. After the Immigration and Nationality Act of 1965 ended the discriminatory quota system, the number and diversity of immigrants increased dramatically, reshaping American demographics.

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Latin American Immigration

Immigration from Latin America, particularly Mexico and Central America, formed the largest group of newcomers to the United States during this period. Economic opportunity and escape from political violence drove many to seek new lives in America.

  • Why People Came:
    • Better jobs and wages in the United States
    • Family members already in the U.S.
    • Violence from civil wars in Central America (1980s)
    • Drug cartel violence in Mexico and Central America
    • Political instability in home countries
  • Where They Settled:
    • Southwest states (California, Arizona, Texas, New Mexico)
    • Major cities like Los Angeles, Houston, Miami
    • New destinations in Southeast and Midwest
    • Agricultural areas for farm workers

By 2015, Hispanic Americans made up about 16% of the U.S. population, becoming the largest minority group in the country, surpassing African Americans at 13%. This demographic shift created vibrant Hispanic communities in many cities and influenced American culture through food, music, language, and media.

Asian Immigration

Asian immigration increased dramatically after 1980, with particularly large numbers coming from China, India, the Philippines, Vietnam, and Korea. By the 2010s, Asian Americans became the fastest-growing immigrant group in the United States.

  • Key Groups and Reasons for Immigration:
    • Chinese and Taiwanese: education, business opportunities
    • Indians: technology jobs, healthcare, education
    • Filipinos: healthcare, family reunification
    • Vietnamese, Cambodians, Laotians: refugee resettlement
    • Koreans: business opportunities, education
  • Contributions to American Society:
    • Strong presence in STEM fields (science, technology, engineering, math)
    • Healthcare professionals (doctors, nurses)
    • Small business owners and entrepreneurs
    • Academic achievement and university enrollment
    • Cultural contributions in food, arts, and business

Asian Americans grew from about 1% of the U.S. population in 1960 to 6% by 2020, making significant impacts especially in technology, medicine, and education.

Immigration Debates and Policies

Immigration became an increasingly controversial political issue from the 1980s onward. Americans debated questions about legal status, border security, and the economic and cultural impacts of immigration.

  • Major Immigration Policies:
    • Immigration Reform and Control Act (1986): Granted amnesty to about 3 million undocumented immigrants under President Reagan
    • Immigration Act (1990): Increased legal immigration caps under President Bush
    • DACA (2012): Protected young undocumented immigrants brought to U.S. as children under President Obama
  • Controversial Issues:
    • Undocumented/illegal immigration
    • Border security and enforcement
    • Economic impacts on American workers
    • Path to citizenship debates
    • Refugee and asylum policies
    • Enforcement priorities and deportations

Presidents took different approaches to immigration. Reagan granted amnesty to millions while later administrations focused more on enforcement. The Obama administration deported record numbers of undocumented immigrants while also creating DACA to protect those brought to the U.S. as children.

Demographic Effects and Cultural Impact

The combined effects of internal migration and immigration significantly changed American demographics. The United States became more diverse in terms of race, ethnicity, language, and religion.

GroupPercentage 1980Percentage 2020Change
White (non-Hispanic)80%60%-20%
Hispanic/Latino6.5%18%+11.5%
Black/African American11.7%13%+1.3%
Asian American1.8%6%+4.2%
  • Cultural Changes:
    • More languages spoken in American communities
    • Growing religious diversity (Islam, Hinduism, Buddhism)
    • Fusion cuisine and international food options widespread
    • Multilingual media and entertainment
    • Celebrations like Cinco de Mayo and Lunar New Year became mainstream
  • Economic Impacts:
    • Immigrants helped fill labor shortages in many industries
    • Contributed to population growth as birth rates declined
    • Started many small businesses and created jobs
    • Brought specialized skills in technology, healthcare, and other fields
    • Sent remittances to families in home countries

Immigration helped maintain U.S. population growth as birth rates declined. Without immigration, the American population would have grown much more slowly or even declined in some regions. These demographic shifts continue to shape American society, culture, and politics as the nation moves further into the 21st century.

Frequently Asked Questions

What is domestic migration and how is it different from international migration?

Domestic migration = movement of people within the United States (state-to-state or region-to-region). In the 1990s–2000s APUSH context this includes Sun Belt migration (population shifting to the South and West), urban-to-suburban moves, and the “suburbanization of poverty.” International migration = people moving from other countries into the U.S.—the big rise in Latin American and Asian immigration, including both high-skilled immigrants and undocumented workers, remittances back home, and cultural impacts (bilingual education debates, sanctuary cities). Key difference: domestic migration changes internal population distribution and regional political/economic power (KC-9.2.II.A), while international migration changes the nation’s labor force, culture, and policy debates (KC-9.2.II.B). For AP exam answers, use these as causes/effects: e.g., Sun Belt growth → political/economic influence; Latino/Asian immigration → labor in agriculture, debates over immigration policy (Operation Gatekeeper, IIRIRA). More on Topic 9.5: (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6). For extra practice, try AP questions (https://library.fiveable.me/practice/ap-us-history).

Why did so many people move to the South and West after 1980?

After 1980 many Americans moved to the South and West (Sun Belt migration) for a mix of economic, political, and cultural reasons. Lower taxes, cheaper land and housing, and business-friendly policies attracted firms (especially energy, manufacturing-supply chains, and later tech), creating jobs in states like Texas, Florida, Arizona, and California. Warmer climate and affordable retirement communities pulled retirees. At the same time international immigration (especially from Latin America and Asia) grew, boosting population and labor supply in Sun Belt metros—immigrant labor also filled jobs in agriculture, construction, and services. Trade changes (e.g., NAFTA) and shifts in manufacturing accelerated regional economic reorganization, while urban demographic change and suburbanization patterns altered where people lived. These causes link directly to Topic 9.5 Learning Objective E (explain causes/effects of migration). For a focused review, see the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and practice questions (https://library.fiveable.me/practice/ap-us-history).

What caused the huge increase in immigration from Latin America and Asia in the 1990s and 2000s?

Several forces explain the big rise in Latin American and Asian immigration in the 1990s–2000s. - Economic push/pull: NAFTA and other global changes disrupted Mexican small farmers and pushed people north, while U.S. demand for low-wage agricultural and service labor and for high-skilled tech workers (H-1B visas) pulled migrants from Latin America and Asia. - Chain migration and networks: established immigrant communities made migration easier—jobs, housing, remittances, and information. - Policy changes and enforcement: tougher border enforcement (Operation Gatekeeper) plus the 1996 IIRIRA increased deportations but didn’t stop flows, redirecting routes and increasing undocumented populations. - Globalization and political instability: economic liberalization, violence, and limited opportunities in sending countries pushed people to migrate. For exam framing, tie causes to Learning Objective E (causes/effects of migration). For a focused review, see the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and practice questions (https://library.fiveable.me/practice/ap-us-history).

How did new immigrants from Latin America and Asia change American culture?

New immigrants from Latin America and Asia reshaped U.S. culture in several clear ways. They fueled Sun Belt and urban growth (KC-9.2.II.A), bringing languages, foods, religions, and family networks that changed everyday life and local politics—leading to debates over bilingual education and the rise of sanctuary cities. Economically, they supplied crucial labor (agriculture, service, and high-skilled tech sectors) and sent remittances home, while increasing suburbanization of poverty in some regions. Politically and culturally, Latino and Asian communities boosted civic pluralism, influenced elections at local and state levels, and expanded multicultural media, festivals, and cuisine. These shifts are fair game on AP prompts asking you to explain causes and effects of migration (CED Learning Objective E); use specific examples (e.g., NAFTA’s impact on migration, debates over undocumented immigrants, Operation Gatekeeper) to support your argument. For a focused review, see the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and more Unit 9 resources (https://library.fiveable.me/ap-us-history/unit-9). Practice related DBQ/LEQ skills with 1000+ practice questions (https://library.fiveable.me/practice/ap-us-history).

What's the difference between the immigration patterns of the 1990s-2000s versus earlier immigration waves?

Short answer: 1990s–2000s immigration differed from earlier waves in origin, skill mix, policy context, and outcomes. After 1980 immigration shifted from mostly European to large increases from Latin America and Asia, including both low-wage (agricultural, service) and growing high-skilled flows (tech, medical). There were more undocumented migrants, stronger border enforcement (Operation Gatekeeper, IIRIRA), and debates over bilingual education, sanctuary cities, and remittances. Domestically, population growth favored the Sun Belt and produced suburbanization of poverty. Earlier waves (19th–early 20th c.) were chiefly European, concentrated in cities, lower-skilled industrial labor, and faced different restrictions (e.g., 1924 quotas). For AP: this fits CED Topic 9.5 (Learning Objective E)—compare causes/effects and continuity/change; review the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and practice questions (https://library.fiveable.me/practice/ap-us-history) to prep for SAQs/LEQs.

Can someone explain why the American South and West became so politically powerful after 1980?

After 1980 the South and West gained population fast (Sun Belt migration), which translated into more political power—more seats in the House, more Electoral College votes, and greater influence over federal policy. Factors: job growth (sunbelt industries, tech, energy), lower taxes/costs, retirement migration, and rising immigration from Latin America and Asia that boosted metro populations. Politically this mattered two ways: shifting congressional reapportionment and state-level control (many Sun Belt states leaned Republican after the 1980s realignment, giving the GOP stronger regional power), while large diverse metros also reshaped local politics and policy debates (immigrant labor, bilingual education, sanctuary cities). For AP you can link this to KC-9.2.II.A and discuss causes/effects of domestic migration in short-answer/LEQ prompts. For a deeper review see the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6), the unit overview (https://library.fiveable.me/ap-us-history/unit-9), and practice questions (https://library.fiveable.me/practice/ap-us-history).

What specific jobs did Latin American and Asian immigrants take in the U.S. economy?

Mostly low-wage service and manual jobs, plus a growing share of high-skilled professions. In the 1990s–2000s, many Latin American immigrants worked in agriculture (seasonal farm labor, fruit/vegetable picking), construction, meatpacking, landscaping, and service-sector jobs—restaurants, housekeeping, childcare, and other domestic work. Undocumented immigrants were disproportionately in those manual and service roles. Asian immigrants showed a split: many filled high-skilled STEM, medical, and tech roles via H-1B and other visas (engineers, doctors, computer programmers), while others worked in small businesses (restaurants, grocery stores), nail salons, and the hospitality sector. Both groups boosted urban labor forces, helped suburbanization of poverty, and sent remittances home. These patterns tie to NAFTA, immigration policy changes, and debates over bilingual education and sanctuary cities—useful evidence for AP short answers or LEQs about causes/effects of post-1980 migration. For a focused review use the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and try practice questions (https://library.fiveable.me/practice/ap-us-history).

I'm confused about why people kept moving within the U.S. even though the country was already developed - can someone help?

Even in a developed country, people kept moving because jobs, climate, cost of living, and culture kept changing. After 1980 the South and West grew fast (Sun Belt migration) as industries, lower taxes, cheaper housing, and warmer weather attracted workers—so cities like Phoenix, Houston, and metro Atlanta expanded. At the same time globalization and tech shifted jobs (service, high-skill, and low-wage immigrant labor), which changed where work was located and pushed people between cities, suburbs, and new metro areas. That produced urban demographic shifts and a “suburbanization of poverty” as housing and employment patterns changed. These movements mattered for politics, schools (bilingual education debates), and local economies—which is exactly what Topic 9.5 asks you to explain (Learning Objective E; KC-9.2.II.A). For a focused review, check the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and practice questions (https://library.fiveable.me/practice/ap-us-history) to prep for AP-style short answers and essays.

How do I write a DBQ essay about the effects of migration on American society in the 1990s and 2000s?

Start your DBQ with a clear thesis that answers how migration in the 1990s–2000s affected American society (economic, cultural, political) and establish a line of reasoning (e.g., Sun Belt growth, labor supply, multicultural change). In your 15-minute reading period, group the documents into 2–3 analytic categories (economic effects: immigrant labor in agriculture, remittances, high-skill immigration; demographic shifts: Sun Belt growth, suburbanization of poverty; political/cultural: bilingual education debates, sanctuary cities, enforcement laws like IIRIRA/Operation Gatekeeper). Use at least four documents to support your argument, cite one additional specific outside fact (NAFTA, increased Latin American/Asian migration, or rise of undocumented populations) and explain POV/purpose for two documents (CED skill 2). Contextualize with broader trends after 1980 (KC-9.2.II.A/B). Aim to show complexity (trade-offs, differing regional impacts). For topic review, see the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6), Unit 9 overview (https://library.fiveable.me/ap-us-history/unit-9), and practice DBQs (https://library.fiveable.me/practice/ap-us-history).

What were the long-term consequences of all this population movement to the South and West?

Mostly permanent shifts in where power, people, and culture are centered in the U.S. Politically and economically, the Sun Belt (South and West) gained seats, federal funding, and business growth—shifting electoral politics and making conservative Sun Belt states more influential (CED KC-9.2.II.A). Demographically, big increases in Latino and Asian immigration changed urban makeup, spawned bilingual education debates, and supplied essential labor (agriculture, service, high-skill) while creating “suburbanization of poverty” and new immigrant enclaves (KC-9.2.II.B; keywords: Latino/Asian immigration, immigrant labor, remittances). Policy and enforcement changed too (IIRIRA, Operation Gatekeeper, sanctuary cities), and cities faced infrastructure pressures and shifting urban-suburban patterns. For AP: this is classic Learning Objective E material—expect short answers or LEQs that ask you to explain causes/effects or continuity/change. Review this Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and practice questions (https://library.fiveable.me/practice/ap-us-history) to prep examples and evidence.

Did the new immigration from Latin America and Asia face the same problems as earlier European immigrants?

Short answer: yes—in some ways the new immigrants from Latin America and Asia faced the same problems as earlier European arrivals (poverty, discrimination, language barriers, crowded urban neighborhoods, and low-wage labor), but in important ways their experience differed. Key similarities: prejudice and nativism, debates over schooling (bilingual education), and reliance on low-paid labor in agriculture, service, and construction—all CED keywords. Key differences: larger numbers from Latin America created more undocumented migration and remittance flows; restrictive 1990s–2000s policies (IIRIRA, Operation Gatekeeper, tougher INS enforcement) changed migration patterns; many Asian immigrants included high-skilled professionals (tech, medicine) unlike many earlier European waves; growth of sanctuary cities and the “suburbanization of poverty” changed settlement patterns and politics. For AP prep, practice comparing continuity/change and cause/effect (use Topic 9.5 study guide for details) (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6). For more review across Unit 9 see (https://library.fiveable.me/ap-us-history/unit-9) and try practice questions (https://library.fiveable.me/practice/ap-us-history).

Why did international migration increase so dramatically after 1980 compared to before?

After 1980 international migration rose sharply because global and U.S. forces converged. Economic globalization and growing US demand for both low-wage (agriculture, service) and high-skilled labor pulled people from Latin America and Asia; political instability, economic crises, and population growth in sending countries pushed them. Changes in policy and networks mattered too: family-reunification clauses, established immigrant communities (chain migration), cheaper travel, and better communications made moving easier. Major policy events—like the 1965 immigration system shift’s long-term effects, the 1986 IRCA amnesty, and later trade and enforcement shifts (NAFTA, Operation Gatekeeper)—also reshaped flows, legal status, and undocumented migration. These trends produced remittances, urban demographic change, and debates over bilingual education and sanctuary cities (CED Topic 9.5). For more AP-aligned review, see the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and practice questions (https://library.fiveable.me/practice/ap-us-history).

What role did economic factors play in both domestic migration and international immigration during this period?

Economic forces were central to both domestic migration and international immigration in the 1990s–2000s. Domestically, job growth in the Sun Belt (service, tech, and construction) plus cheaper housing and lower taxes pulled people from the Northeast/Midwest, producing the South/West’s rising political and economic influence (CED KC-9.2.II.A). Internationally, increased demand for low-wage labor in agriculture, construction, and services drew migrants from Latin America and Asia, while expanding high-skilled tech jobs attracted skilled immigrants. Trade shifts (e.g., NAFTA) disrupted Mexican agriculture, boosting migration and remittances back home. Economic causes also shaped policy: employer sanctions, the Illegal Immigration Reform and Immigrant Responsibility Act, and enforcement actions like Operation Gatekeeper responded to labor-market realities and concerns about undocumented immigration. Effects included urban demographic shifts, suburbanization of poverty, bilingual-education debates, and ongoing reliance on immigrant labor. For AP exam use: tie these economic causes to specific effects and policies when you “explain causes and effects” (Learning Objective E). See the Topic 9.5 study guide (https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and practice questions (https://library.fiveable.me/practice/ap-us-history).

How did the political influence of different regions change because of population shifts?

As population moved into the South and West (Sun Belt migration) in the 1990s–2000s, political power followed: reapportionment after the Census shifted U.S. House seats—and thus Electoral College votes—toward fast-growing states (e.g., Texas, Florida, Arizona), strengthening those regions’ national influence. That helped realign party competition (the Sun Belt became more politically central and competitive) and made Latino and Asian immigration key electoral factors in swing states, fueling debates over bilingual education, immigration policy, and sanctuary cities. At the state level, redistricting and growing suburbs changed legislative majorities and policy priorities (taxes, education, immigration enforcement). For AP relevance, this fits Theme 5 (Politics and Power) and could show up on SAQs, LEQs, or DBQs asking you to explain causes/effects of migration (use CED keywords like Sun Belt migration, Latino/Asian immigration). Review Topic 9.5 for examples (study guide: https://library.fiveable.me/ap-us-history/unit-9/migration-immigration-1990s-2000s/study-guide/h48Rw9Wyn6SOzLUA4mF6) and practice questions (https://library.fiveable.me/practice/ap-us-history).