Defiance County, Ohio
County seat: Defiance · Population 38,292 (2025) · 411 sq mi
Defiance County is the 65th most populous of Ohio's 88 counties, with 38,292 people (2025 estimate). Its county seat is Defiance. The map shows its 4 cities and towns and the 6 neighboring counties.
Defiance County facts
- County seat
- Defiance
- Population (2025 estimate)
- 38,292 +0% since 2020
- Land area
- 411 sq mi 62nd largest of 88
- Water area
- 3 sq mi
- Population density
- 93 per sq mi
- Established
- 1845
- Named after
- Fort Defiance former fort in present-day Defiance, Ohio, United States
- Largest city
- Defiance 17,009
- Median household income
- $73,064
- Cities and towns
- 4 plus 1 CDPs
- ZIP codes
- 16
- Time zone
- Eastern
- FIPS code
- 39039
Cities and towns in Defiance County
Defiance County has 4 incorporated cities, towns and villages. Populations count the people living inside Defiance County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Defiance (county seat) | City | 17,009 | |
| Hicksville | Village | 3,427 | |
| Sherwood | Village | 816 | |
| Ney | Village | 297 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Brunersburg | 323 |
ZIP codes in Defiance County
16 ZIP codes reach into Defiance County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 43506 also Williams County
- 43512 also Paulding and Henry counties
- 43517 also Williams County
- 43519
- 43520
- 43526 also Paulding County
- 43527 also Henry County
- 43530
- 43536
- 43545 also Henry County
- 43548 also Henry and Putnam counties
- 43549
- 43556
- 45813 also Paulding County
- 45821 also Paulding County
- 45831 also Putnam and Paulding counties
Population of Defiance County, 2020–2025
Defiance County grew by 4 people (+0%) between April 2020 and July 2025: 320 more deaths than births and a net gain of 328 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 38,268 |
| 2021 | 38,177 |
| 2022 | 38,139 |
| 2023 | 38,301 |
| 2024 | 38,333 |
| 2025 | 38,292 |
Neighboring counties
- Paulding County south · 18,727 people
- Williams County north · 36,549 people
- Henry County east · 27,598 people
- DeKalb County, Indiana west · 44,535 people
- Putnam County southeast · 34,380 people
- Allen County, Indiana southwest · 402,329 people
Printable Defiance 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) (78 KB)
- PNG (2400 px) (56 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.
Back to the Ohio county map with all 88 counties. Found an error? Tell us.