Marion County, Texas
County seat: Jefferson · Population 9,896 (2025) · 381 sq mi
Marion County is the 164th most populous of Texas's 254 counties, with 9,896 people (2025 estimate). Its county seat is Jefferson. It is part of the Upper East region, one of the 12 Texas Comptroller economic regions. The map shows its 1 city or town and the 5 neighboring counties.
Marion County facts
- County seat
- Jefferson
- Population (2025 estimate)
- 9,896 +0.6% since 2020
- Land area
- 381 sq mi 243rd largest of 254
- Water area
- 39 sq mi
- Population density
- 26 per sq mi
- Established
- 1860
- Named after
- Francis Marion American politician, Continental Army officer (1732-1795)
- Largest city
- Jefferson 2,056
- Median household income
- $49,672
- Cities and towns
- 1 plus 1 CDPs
- ZIP codes
- 7
- Time zone
- Central
- FIPS code
- 48315
Cities and towns in Marion County
Marion County has 1 incorporated place. Populations count the people living inside Marion County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Jefferson (county seat) | City | 2,056 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Pine Harbor | 566 |
ZIP codes in Marion County
7 ZIP codes reach into Marion County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 75555 also Cass County
- 75630 also Cass County
- 75640 also Harrison and Upshur counties
- 75651 also Harrison County
- 75657 also Cass and Harrison counties
- 75668 also Morris County
- 75683 also Upshur County
Population of Marion County, 2020–2025
Marion County grew by 54 people (+0.6%) between April 2020 and July 2025: 436 more deaths than births and a net gain of 497 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 9,866 |
| 2021 | 9,738 |
| 2022 | 9,673 |
| 2023 | 9,717 |
| 2024 | 9,831 |
| 2025 | 9,896 |
Neighboring counties
- Harrison County south · 71,956 people
- Cass County north · 28,651 people
- Caddo Parish, Louisiana southeast · 224,226 people
- Upshur County west · 44,410 people
- Morris County northwest · 12,133 people
Printable Marion 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) (129 KB)
- PNG (2400 px) (66 KB)
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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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