Starr County, Texas
Updated · Data: U.S. Census Bureau
Starr County, Texas has its county seat in Rio Grande City and FIPS code 48427. About 65,809 people live here, the 54th most populated of the 254 Texas counties.
| County seat | Rio Grande City |
|---|---|
| FIPS code | 48427 (Texas 48 + county 427) · all Texas FIPS codes |
| Population | 65,809 (54th of 254) |
| Land area | 1,223.2 sq mi (39th largest; + 5.9 sq mi water) |
| People per sq mi | 53.8 |
| Time zone | Central time (America/Chicago) |
| Median home value | $93,300 |
| Median property tax paid | $1,047 a year (about 1.12% of the median home value: our calculation, not an official rate) |
| Official website | www.co.starr.tx.us |
What counties border Starr County?
Starr County shares a border with 4 counties:
What cities and towns are in Starr County?
7 places with 1,000+ people have residents here; together they hold about 54% of the county's population. The rest live in smaller communities and rural areas.
| Place | Population | Residents in this county |
|---|---|---|
| Rio Grande City | 15,258 | 100.0% |
| Roma | 11,543 | 100.0% |
| Escobares | 2,563 | 100.0% |
| Las Lomas (CDP) | 1,836 | 100.0% |
| Mikes (CDP) | 1,676 | 100.0% |
| La Grulla | 1,447 | 100.0% |
| Mi Ranchito Estate (CDP) | 1,127 | 100.0% |
CDP = census-designated place: a named community with no city government.
What ZIP codes are in Starr County?
10 ZIP code areas with residents touch Starr County; the ones marked * cross into another county.
Check an exact address with the address lookup, look up a ZIP code, or see how to confirm your county with official records.
Sources: Census TIGER/Line 2024 (boundary, area, neighbors); ACS 2019-2023 5-year (population, home value, taxes paid); Wikidata, CC0 (seat, website); timezone-boundary-builder (time zone). Data as of November 1, 2026. Not affiliated with any government agency.
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