Ross County, Ohio
County seat: Chillicothe · Population 76,429 (2025) · 689 sq mi
Ross County is the 32nd most populous of Ohio's 88 counties, with 76,429 people (2025 estimate). Its county seat is Chillicothe. The map shows its 8 cities and towns and the 7 neighboring counties.
Ross County facts
- County seat
- Chillicothe
- Population (2025 estimate)
- 76,429 −0.9% since 2020
- Land area
- 689 sq mi 2nd largest of 88
- Water area
- 4 sq mi
- Population density
- 111 per sq mi
- Established
- 1798
- Named after
- James Ross Pennsylvania politician (1762-1847)
- Largest city
- Chillicothe 21,815
- Median household income
- $61,303
- Cities and towns
- 8 plus 4 CDPs
- ZIP codes
- 16
- Time zone
- Eastern
- FIPS code
- 39141
Cities and towns in Ross County
Ross County has 8 incorporated cities, towns and villages. Populations count the people living inside Ross County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Chillicothe (county seat) | City | 21,815 | |
| Kingston | Village | 1,236 | |
| Frankfort | Village | 1,094 | |
| Bainbridge | Village | 737 | |
| Clarksburg | Village | 400 | |
| Adelphi | Village | 313 | |
| South Salem | Village | 207 | |
| Greenfield | Village | 0 | Highland County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Massieville | 642 | |
| Bourneville | 509 | |
| Andersonville | 495 | |
| Richmond Dale | 473 |
ZIP codes in Ross County
16 ZIP codes reach into Ross County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 43101
- 43115 also Pickaway County
- 43135 also Hocking, Pickaway and Vinton counties
- 43160 also Fayette County
- 43164 also Pickaway County
- 45123 also Highland and Fayette counties
- 45601 also Pike and Jackson counties
- 45612 also Pike and Highland counties
- 45617
- 45628
- 45644 also Pickaway County
- 45647 also Vinton County
- 45672 also Vinton and Jackson counties
- 45673
- 45681
- 45690 also Pike County
Population of Ross County, 2020–2025
Ross County shrank by 665 people (−0.9%) between April 2020 and July 2025: 1,676 more deaths than births and a net gain of 989 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 77,067 |
| 2021 | 76,493 |
| 2022 | 76,365 |
| 2023 | 76,276 |
| 2024 | 75,998 |
| 2025 | 76,429 |
Neighboring counties
- Pickaway County north · 62,978 people
- Pike County south · 27,061 people
- Highland County west · 43,823 people
- Fayette County northwest · 28,552 people
- Vinton County east · 12,645 people
- Hocking County east · 27,512 people
- Jackson County southeast · 32,817 people
Printable Ross 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) (106 KB)
- PNG (2400 px) (78 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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