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Irion County, Texas

Updated November 1, 2026 · Data: U.S. Census Bureau

Irion County, Texas has its county seat in Mertzon and FIPS code 48235. About 1,432 people live here, the 238th most populated of the 254 Texas counties.

County seat	Mertzon
FIPS code	48235 (Texas 48 + county 235) · all Texas FIPS codes
Population	1,432 (238th of 254)
Land area	1,051.5 sq mi (62nd largest; + 0.1 sq mi water)
People per sq mi	1.4
Time zone	Central time (America/Chicago)
Median home value	$152,600
Median property tax paid	$1,456 a year (about 0.95% of the median home value: our calculation, not an official rate)
Official website	www.co.irion.tx.us

What counties border Irion County?

Irion County shares a border with 4 counties:

What ZIP codes are in Irion County?

4 ZIP code areas with residents touch Irion 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.

FAQ

Frequently asked questions

What is the county seat of Irion County, Texas?

Mertzon.

What is the FIPS code for Irion County?

48235. The first two digits (48) are Texas; the last three (235) are the county.

What counties border Irion County?

Crockett County, Reagan County, Schleicher County, Tom Green County.

How many people live in Irion County?

About 1,432 (ACS 2019-2023 5-year estimate), the 238th most of the 254 Texas counties.

What time zone is Irion County in?

Central time (America/Chicago).

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