Champaign County, Ohio
County seat: Urbana · Population 38,820 (2025) · 429 sq mi
Champaign County is the 63rd most populous of Ohio's 88 counties, with 38,820 people (2025 estimate). Its county seat is Urbana. The map shows its 7 cities and towns and the 6 neighboring counties.
Champaign County facts
- County seat
- Urbana
- Population (2025 estimate)
- 38,820 +0.3% since 2020
- Land area
- 429 sq mi 47th largest of 88
- Water area
- 1 sq mi
- Population density
- 91 per sq mi
- Established
- 1805
- Largest city
- Urbana 11,140
- Median household income
- $75,556
- Cities and towns
- 7 plus 1 CDPs
- ZIP codes
- 18
- Time zone
- Eastern
- FIPS code
- 39021
Cities and towns in Champaign County
Champaign County has 7 incorporated cities, towns and villages. Populations count the people living inside Champaign County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Urbana (county seat) | City | 11,140 | |
| St. Paris | Village | 1,884 | |
| Mechanicsburg | Village | 1,681 | |
| North Lewisburg | Village | 1,657 | |
| Christiansburg | Village | 503 | |
| Woodstock | Village | 284 | |
| Mutual | Village | 127 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Rosewood | 362 |
ZIP codes in Champaign County
18 ZIP codes reach into Champaign County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 43009
- 43044 also Madison and Clark counties
- 43045 also Union County
- 43047
- 43060 also Logan and Union counties
- 43070
- 43072
- 43078 also Clark County
- 43084 also Union County
- 43318 also Logan County
- 43343 also Logan County
- 43357 also Logan County
- 45312 also Miami County
- 45317 also Miami and Shelby counties
- 45344 also Clark, Miami and Montgomery counties
- 45365 also Shelby County
- 45389
- 45502 also Clark County
Population of Champaign County, 2020–2025
Champaign County grew by 109 people (+0.3%) between April 2020 and July 2025: 418 more deaths than births and a net gain of 519 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 38,741 |
| 2021 | 38,788 |
| 2022 | 38,675 |
| 2023 | 38,750 |
| 2024 | 38,717 |
| 2025 | 38,820 |
Neighboring counties
- Clark County south · 135,340 people
- Logan County north · 46,302 people
- Union County northeast · 73,446 people
- Miami County west · 112,634 people
- Madison County southeast · 46,985 people
- Shelby County northwest · 48,065 people
Printable Champaign 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) (88 KB)
- PNG (2400 px) (66 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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