Trinity County, Texas
County seat: Groveton · Population 14,384 (2025) · 694 sq mi
Trinity County is the 143rd most populous of Texas's 254 counties, with 14,384 people (2025 estimate). Its county seat is Groveton. It is part of the Southeast region, one of the 12 Texas Comptroller economic regions. The map shows its 2 cities and towns and the 5 neighboring counties.
Trinity County facts
- County seat
- Groveton
- Population (2025 estimate)
- 14,384 +5.7% since 2020
- Land area
- 694 sq mi 218th largest of 254
- Water area
- 20 sq mi
- Population density
- 21 per sq mi
- Established
- 1850
- Named after
- Trinity River river in Texas, United States
- Largest city
- Trinity 2,450
- Median household income
- $52,018
- Cities and towns
- 2 plus 1 CDPs
- ZIP codes
- 8
- Time zone
- Central
- FIPS code
- 48455
Cities and towns in Trinity County
Trinity County has 2 incorporated cities, towns and villages. Populations count the people living inside Trinity County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Trinity | City | 2,450 | |
| Groveton (county seat) | City | 922 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Westwood Shores | 1,466 |
ZIP codes in Trinity County
8 ZIP codes reach into Trinity County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 75845
- 75847 also Houston County
- 75851 also Houston County
- 75856 also Houston County
- 75862 also Walker County
- 75865
- 75904 also Angelina County
- 75926
Population of Trinity County, 2020–2025
Trinity County grew by 780 people (+5.7%) between April 2020 and July 2025: 794 more deaths than births and a net gain of 1,571 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 13,636 |
| 2021 | 13,837 |
| 2022 | 13,992 |
| 2023 | 14,265 |
| 2024 | 14,434 |
| 2025 | 14,384 |
Neighboring counties
- Angelina County east · 88,154 people
- Houston County northwest · 22,316 people
- Polk County southeast · 53,434 people
- Walker County southwest · 83,842 people
- San Jacinto County south · 29,488 people
Printable Trinity 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) (136 KB)
- PNG (2400 px) (82 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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