Wyandot County, Ohio
County seat: Upper Sandusky · Population 21,567 (2025) · 407 sq mi
Wyandot County is the 82nd most populous of Ohio's 88 counties, with 21,567 people (2025 estimate). Its county seat is Upper Sandusky. The map shows its 8 cities and towns and the 5 neighboring counties.
Wyandot County facts
- County seat
- Upper Sandusky
- Population (2025 estimate)
- 21,567 −1.6% since 2020
- Land area
- 407 sq mi 69th largest of 88
- Water area
- 1 sq mi
- Population density
- 53 per sq mi
- Established
- 1845
- Named after
- Wyandot people North American ethnic group
- Largest city
- Upper Sandusky 6,661
- Median household income
- $69,768
- Cities and towns
- 8 plus 1 CDPs
- ZIP codes
- 13
- Time zone
- Eastern
- FIPS code
- 39175
Cities and towns in Wyandot County
Wyandot County has 8 incorporated cities, towns and villages. Populations count the people living inside Wyandot County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Upper Sandusky (county seat) | City | 6,661 | |
| Carey | Village | 3,529 | |
| Sycamore | Village | 771 | |
| Nevada | Village | 698 | |
| Wharton | Village | 320 | |
| Harpster | Village | 155 | |
| Kirby | Village | 116 | |
| Marseilles | Village | 95 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| McCutchenville | 257 | Seneca County |
ZIP codes in Wyandot County
13 ZIP codes reach into Wyandot County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 43316 also Seneca and Hancock counties
- 43323 also Marion County
- 43330
- 43332 also Marion and Hardin counties
- 43337 also Marion County
- 43351
- 43359
- 44820 also Crawford County
- 44844 also Seneca County
- 44849 also Crawford and Marion counties
- 44882 also Crawford and Seneca counties
- 45843 also Hardin and Hancock counties
- 45867 also Hancock County
Population of Wyandot County, 2020–2025
Wyandot County shrank by 341 people (−1.6%) between April 2020 and July 2025: 338 more deaths than births and a net loss of 1 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 21,878 |
| 2021 | 21,689 |
| 2022 | 21,569 |
| 2023 | 21,473 |
| 2024 | 21,559 |
| 2025 | 21,567 |
Neighboring counties
- Crawford County east · 41,896 people
- Marion County southeast · 65,115 people
- Hancock County northwest · 75,034 people
- Seneca County northeast · 54,522 people
- Hardin County southwest · 30,072 people
Printable Wyandot 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) (86 KB)
- PNG (2400 px) (63 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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