Highest Mexican population share, US counties
US counties ranked by the share of all residents who are Mexican origin (2023 American Community Survey). A concentration measure: Mexican residents as a percentage of total population. Starr County, Texas leads at 92.0%. 3,106 counties qualify in total. Texas carries 23 of the top 25 entries.
UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which county has the highest mexican share?
Starr County, Texas ranks #1 with 92.0% (2024 American Community Survey).
What are the top 5 counties by mexican share?
Starr County, Texas, Maverick County, Texas, Jim Hogg County, Texas, Webb County, Texas, Zavala County, Texas.
How many counties are in this ranking?
3,106 counties qualify after filtering for population minimums and data availability. The ranking covers 2024 ACS 5-year data.
How is mexican share measured?
Share of all residents who are Mexican origin (Hispanic origin, ACS detailed tables). Source: US Census Bureau, American Community Survey 5-year estimates (2024).