Irion County, Texas
County seat: Mertzon · Population 1,463 (2025) · 1,052 sq mi
Irion County is the 239th most populous of Texas's 254 counties, with 1,463 people (2025 estimate). Its county seat is Mertzon. It is part of the West Texas region, one of the 12 Texas Comptroller economic regions. The map shows its 1 city or town and the 4 neighboring counties.
Irion County facts
- County seat
- Mertzon
- Population (2025 estimate)
- 1,463 −3% since 2020
- Land area
- 1,052 sq mi 62nd largest of 254
- Water area
- 0 sq mi
- Population density
- 1 per sq mi
- Established
- 1889
- Named after
- Robert Anderson Irion Republic of Texas.politicians and physician (1804–1861)
- Largest city
- Mertzon 726
- Median household income
- $70,357
- Cities and towns
- 1
- ZIP codes
- 4
- Time zone
- Central
- FIPS code
- 48235
Cities and towns in Irion County
Irion County has 1 incorporated place. Populations count the people living inside Irion County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Mertzon (county seat) | City | 726 |
ZIP codes in Irion County
4 ZIP codes reach into Irion County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 76901 also Tom Green County
- 76904 also Tom Green County
- 76930 also Crockett County
- 76941
Population of Irion County, 2020–2025
Irion County shrank by 45 people (−3%) between April 2020 and July 2025: 9 more deaths than births and a net loss of 37 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 1,506 |
| 2021 | 1,531 |
| 2022 | 1,538 |
| 2023 | 1,552 |
| 2024 | 1,509 |
| 2025 | 1,463 |
Neighboring counties
- Tom Green County east · 120,602 people
- Reagan County west · 3,166 people
- Crockett County southwest · 2,769 people
- Schleicher County southeast · 2,245 people
Printable Irion County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (116 KB)
- PNG (2400 px) (48 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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