casestudynotes

Migration from Mexico to the United States

Workers and families moving from Mexico to the United States for higher wages, a flow that has slowed since the late 2000s and sent 61,791 million US dollars home in remittances in 2025.

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  • Mexico
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Evidence

9 figures, each threaded to its source

Mexican immigrants in the United States in 1970

1 millionpeople

pewresearch.org

In 1970, fewer than 1 million Mexican immigrants lived in the U.S.

Mexican immigrants in the United States

10.6 millionpeople

pewresearch.org

The largest numbers hail from Mexico (10.6 million) and India (2.8 million).

Mexican share of the United States immigrant population

23percent

pewresearch.org

Mexicans' share of the immigrant population fell from 29% in 2010 to 23% in 2022.

Unauthorised immigrants born in Mexico

4.3 millionpeople

pewresearch.org

the unauthorized immigrant population born in Mexico grew only a little from 2021 to 2023, returning to its 2019 level of about 4.3 million

Mexico's share of unauthorised immigrants

30percent

pewresearch.org

it accounted for 30% of the nation's unauthorized immigrants living here in 2023

Remittances to Mexico

61,791 millionUS dollars

2 sources

bbvaresearch.com

the end of this growth streak is confirmed for 2025. Last year, Mexico received 61,791 million USD in family remittances, a figure that represents a 4.6% year-on-year decrease.

Remittances as a share of Mexico's national income

3.4percent

bbvaresearch.com

By 2025, a reduction in dependence on remittances is observed, with remittances representing 3.4% of national GDP.

Length of the Mexico and United States boundary

1,954miles

ibwc.gov

the boundary between the U.S. and Mexico extends 1,954 miles

Seasonal farm work visas issued to Mexicans

285,800visas

usafacts.org

the country's 285,800 recipients made up 90.6% of total visas issued

Background

Mexicans are the largest immigrant group in the United States, and their movement north is the biggest country to country flow in the modern Americas. In 1970, fewer than 1 million Mexican immigrants lived in the United States. Numbers rose steeply through the 1980s and 1990s as rural wages fell behind, farm work grew insecure, and employers in Texas, California and the Midwest hired the workers who arrived. The count reached 10.6 million by 2022, which was 23 percent of all immigrants in the country. The countries share a boundary that extends 1,954 miles, much of it along the Rio Grande, and settled communities on both sides make the journey familiar rather than strange. The flow is not all unauthorised. About 4.3 million people born in Mexico were living in the United States without authorisation in 2023, which was 30 percent of the unauthorised population, and the rest hold visas, permanent residence or citizenship. Movement has also slowed and at times reversed. After the financial crisis of 2008 more Mexicans went home than arrived, Mexican birth rates fell and the Mexican economy offered more work, so recent arrivals at the border have come mostly from countries further south. For Mexico the flow returns money: remittances were worth 61,791 million US dollars in 2025 and 3.4 percent of national income. The United States manages the flow with fencing, patrols and detention at the boundary, and with legal routes, above all the seasonal farm work visas issued to 285,800 Mexicans in 2024.

Causes

Wages and jobs pull workers north

A worker in farming, construction, meat processing or hotels can earn much more in the United States than at home, and employers there have long wanted labour they cannot recruit locally. Seasonal crop work depends on Mexican hands in particular, and the legal seasonal farm work visa route issued 285,800 visas to Mexicans in 2024. The wage gap between the two countries has never closed enough to remove the pull.

Family and established communities keep the route open

Migration follows people who have already gone. Mexican communities in Texas, California, Illinois and Arizona give new arrivals somewhere to stay, work to walk into and help with paperwork, so moving carries far less risk than a move to an unfamiliar country would. With 10.6 million Mexican born people in the United States by 2022, many sending towns have relatives at the other end, and money and advice travel back along the same chain.

Weak rural incomes and insecurity push people out

Small farms in central and southern Mexico struggle against imported grain, and rural wages have stayed low while the cost of living has not. In several states, violence linked to organised crime adds a push that has little to do with jobs. Both pressures fall hardest on young adults, who are the people most able to travel and the ones employers on the other side want.

Effects

Primary

  • The Mexican born population of the United States rose from fewer than 1 million in 1970 to 10.6 million by 2022.
  • Mexicans became the largest immigrant group in the country, 23 percent of all immigrants in 2022.
  • About 4.3 million people born in Mexico were living in the United States without authorisation in 2023.

Secondary

  • Growth in the flow stalled after the late 2000s, and recent arrivals at the border come mostly from countries further south.
  • Mexico's share of the unauthorised population in the United States fell to 30 percent in 2023 as other origins grew.
  • Sending villages in central Mexico have lost working age adults and now lean on money sent from abroad.

Social

  • Families are split across the boundary, often for years, with children left in Mexico with grandparents.
  • Mexican language, food and festivals have shaped cities across the southern and western United States.
  • People living without authorisation avoid reporting crime or seeking health care in case it exposes them.

Economic

  • Remittances to Mexico reached 61,791 million US dollars in 2025, worth 3.4 percent of national income.
  • Crop farming, construction and food processing in the United States lean on Mexican labour, and 285,800 Mexicans held seasonal farm work visas in 2024.
  • Mexico loses young workers it has fed, schooled and trained, while the United States gains them ready to work.

Environmental

  • Fencing and patrol roads along the boundary cut across desert habitat and block the movement of wildlife.
  • People crossing remote desert in Arizona and Texas leave litter and discarded water containers along the trails.
  • Fast growth of border cities such as Tijuana and Ciudad Juárez has strained water supply and air quality.

Responses

Immediate

  • United States Border Patrol agents detain people who cross between official ports of entry and return them to Mexico.
  • Mexican consulates in the United States issue identity documents and provide legal help to nationals who are detained.
  • Shelters run by churches and charities on the Mexican side house people waiting to cross or recently returned.

Long term

  • The boundary, which extends 1,954 miles, is watched with fencing, cameras, sensors, aircraft and a large patrol force.
  • Legal seasonal farm work visas have widened the lawful route, and 285,800 went to Mexicans in 2024.
  • Mexico has put schooling, cash transfer payments and factory investment into sending states to give people a reason to stay.
  • Cheap electronic transfers carry remittances home, and they were worth 3.4 percent of Mexico's national income in 2025.

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