Largest foreign-born population, US counties
US counties with the most residents born outside the United States, as of the 2024 American Community Survey. Ranked by number of people, not share. Los Angeles County, California leads at 3,279,695. 3,144 counties qualify in total. California carries 8 of the top 25 entries.
UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which county has the highest foreign-born population?
Los Angeles County, California ranks #1 with 3,279,695 (2024 American Community Survey).
What are the top 5 counties by foreign-born population?
Los Angeles County, California, Miami-Dade County, Florida, Harris County, Texas, Cook County, Illinois, Queens County, New York.
How many counties are in this ranking?
3,144 counties qualify after filtering for population minimums and data availability. The ranking covers 2024 ACS 5-year data.
How is foreign-born population measured?
Number of residents born outside the United States (ACS B05002). The raw-count companion to the foreign-born share. Source: US Census Bureau, American Community Survey 5-year estimates (2024).