Preble County, Ohio
County seat: Eaton · Population 40,664 (2025) · 424 sq mi
Preble County is the 61st most populous of Ohio's 88 counties, with 40,664 people (2025 estimate). Its county seat is Eaton. The map shows its 11 cities and towns and the 5 neighboring counties.
Preble County facts
- County seat
- Eaton
- Population (2025 estimate)
- 40,664 −0.8% since 2020
- Land area
- 424 sq mi 48th largest of 88
- Water area
- 2 sq mi
- Population density
- 96 per sq mi
- Established
- 1808
- Named after
- Edward Preble American commodore (1761-1807)
- Largest city
- Eaton 8,327
- Median household income
- $69,223
- Cities and towns
- 11 plus 1 CDPs
- ZIP codes
- 16
- Time zone
- Eastern
- FIPS code
- 39135
Cities and towns in Preble County
Preble County has 11 incorporated cities, towns and villages. Populations count the people living inside Preble County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Eaton (county seat) | City | 8,327 | |
| Camden | Village | 1,984 | |
| Lewisburg | Village | 1,734 | |
| New Paris | Village | 1,480 | |
| West Alexandria | Village | 1,311 | |
| Gratis | Village | 835 | |
| Eldorado | Village | 447 | |
| West Manchester | Village | 411 | |
| Verona | Village | 333 | Montgomery County |
| College Corner | Village | 247 | Butler County |
| West Elkton | Village | 156 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Lake Lakengren | 3,445 |
ZIP codes in Preble County
16 ZIP codes reach into Preble County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 45003 also Butler County
- 45042 also Butler, Montgomery and Warren counties
- 45064 also Butler County
- 45070
- 45304 also Darke and Miami counties
- 45309 also Montgomery, Darke and Miami counties
- 45311
- 45320
- 45321
- 45327 also Montgomery, Butler and Warren counties
- 45330
- 45338 also Darke County
- 45347 also Darke County
- 45378 also Montgomery County
- 45381 also Montgomery County
- 45382 also Darke County
Population of Preble County, 2020–2025
Preble County shrank by 335 people (−0.8%) between April 2020 and July 2025: 844 more deaths than births and a net gain of 493 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 41,007 |
| 2021 | 40,871 |
| 2022 | 40,526 |
| 2023 | 40,561 |
| 2024 | 40,718 |
| 2025 | 40,664 |
Neighboring counties
- Montgomery County east · 539,598 people
- Butler County south · 400,128 people
- Darke County north · 51,520 people
- Wayne County, Indiana northwest · 66,169 people
- Union County, Indiana southwest · 6,863 people
Printable Preble 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) (96 KB)
- PNG (2400 px) (77 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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