McMullen County, Texas
County seat: Tilden · Population 544 (2025) · 1,140 sq mi
McMullen County is the 251st most populous of Texas's 254 counties, with 544 people (2025 estimate). Its county seat is Tilden. It is part of the South Texas region, one of the 12 Texas Comptroller economic regions. The map shows its 0 cities and towns and the 5 neighboring counties.
McMullen County facts
- County seat
- Tilden
- Population (2025 estimate)
- 544 −9.5% since 2020
- Land area
- 1,140 sq mi 43rd largest of 254
- Water area
- 17 sq mi
- Population density
- 1 per sq mi
- Established
- 1858
- Named after
- John McMullen Irish colonist in Texas
- Largest city
- Tilden 259
- Median household income
- $43,875
- Cities and towns
- 0 plus 1 CDPs
- ZIP codes
- 7
- Time zone
- Central
- FIPS code
- 48311
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Tilden | 259 |
ZIP codes in McMullen County
7 ZIP codes reach into McMullen County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 78007
- 78021 also La Salle County
- 78022 also Live Oak County
- 78026 also Atascosa County
- 78071 also Live Oak County
- 78072
- 78075 also Live Oak County
Population of McMullen County, 2020–2025
McMullen County shrank by 57 people (−9.5%) between April 2020 and July 2025: 37 more deaths than births and a net loss of 20 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 598 |
| 2021 | 594 |
| 2022 | 574 |
| 2023 | 577 |
| 2024 | 558 |
| 2025 | 544 |
Neighboring counties
- La Salle County west · 6,517 people
- Live Oak County east · 11,929 people
- Atascosa County north · 53,590 people
- Duval County south · 9,402 people
- Webb County southwest · 281,224 people
Printable McMullen 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) (115 KB)
- PNG (2400 px) (58 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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