Shiawassee County, Michigan
County seat: Corunna · Population 67,681 (2025) · 531 sq mi
Shiawassee County is the 29th most populous of Michigan's 83 counties, with 67,681 people (2025 estimate). Its county seat is Corunna. It is part of the East (Region 6) region, one of the 10 Michigan prosperity regions. The map shows its 12 cities and towns and the 6 neighboring counties.
Shiawassee County facts
- County seat
- Corunna
- Population (2025 estimate)
- 67,681 −0.6% since 2020
- Land area
- 531 sq mi 65th largest of 83
- Water area
- 10 sq mi
- Population density
- 127 per sq mi
- Established
- 1822
- Named after
- Shiawassee River river in Michigan, United States
- Largest city
- Owosso 14,437
- Median household income
- $67,404
- Cities and towns
- 12 plus 3 CDPs
- ZIP codes
- 19
- Time zone
- Eastern
- FIPS code
- 26155
Cities and towns in Shiawassee County
Shiawassee County has 12 incorporated cities, towns and villages. Populations count the people living inside Shiawassee County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Owosso | City | 14,437 | |
| Durand | City | 3,457 | |
| Corunna (county seat) | City | 3,000 | |
| Perry | City | 2,134 | |
| Laingsburg | City | 1,402 | |
| Morrice | Village | 975 | |
| Vernon | Village | 715 | |
| New Lothrop | Village | 582 | |
| Byron | Village | 525 | |
| Bancroft | Village | 473 | |
| Lennon | Village | 370 | Genesee County |
| Ovid | City | 0 | Clinton County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Middletown | 799 | |
| Shaftsburg | 441 | |
| Henderson | 320 |
ZIP codes in Shiawassee County
19 ZIP codes reach into Shiawassee County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 48414
- 48418 also Genesee and Livingston counties
- 48429 also Genesee County
- 48433 also Genesee County
- 48436 also Genesee County
- 48449 also Genesee County
- 48460 also Saginaw and Genesee counties
- 48476
- 48616 also Saginaw County
- 48649 also Saginaw County
- 48817
- 48831 also Clinton, Saginaw and Gratiot counties
- 48840 also Ingham and Clinton counties
- 48841 also Saginaw County
- 48848 also Clinton County
- 48857
- 48866 also Clinton County
- 48867
- 48872 also Ingham and Livingston counties
Population of Shiawassee County, 2020–2025
Shiawassee County shrank by 397 people (−0.6%) between April 2020 and July 2025: 1,098 more deaths than births and a net gain of 698 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 67,990 |
| 2021 | 67,989 |
| 2022 | 67,955 |
| 2023 | 67,916 |
| 2024 | 67,828 |
| 2025 | 67,681 |
Neighboring counties
- Genesee County east · 401,093 people
- Clinton County west · 80,432 people
- Saginaw County north · 187,688 people
- Livingston County southeast · 197,315 people
- Ingham County southwest · 289,709 people
- Gratiot County northwest · 41,190 people
Printable Shiawassee 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) (146 KB)
- PNG (2400 px) (77 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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