Mason County, Michigan
County seat: Ludington · Population 29,040 (2025) · 495 sq mi
Mason County is the 49th most populous of Michigan's 83 counties, with 29,040 people (2025 estimate). Its county seat is Ludington. It is part of the West (Region 4) region, one of the 10 Michigan prosperity regions. The map shows its 5 cities and towns and the 6 neighboring counties.
Mason County facts
- County seat
- Ludington
- Population (2025 estimate)
- 29,040 −0.1% since 2020
- Land area
- 495 sq mi 73rd largest of 83
- Water area
- 747 sq mi
- Population density
- 59 per sq mi
- Established
- 1840
- Same name
- One of 6 Mason Counties in the US
- Named after
- Stevens T. Mason American politician (1811-1843)
- Largest city
- Ludington 7,634
- Median household income
- $64,748
- Cities and towns
- 5
- ZIP codes
- 10
- Time zone
- Eastern
- FIPS code
- 26105
Cities and towns in Mason County
Mason County has 5 incorporated cities, towns and villages. Populations count the people living inside Mason County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Ludington (county seat) | City | 7,634 | |
| Scottville | City | 1,348 | |
| Custer | Village | 300 | |
| Fountain | Village | 185 | |
| Free Soil | Village | 148 |
ZIP codes in Mason County
10 ZIP codes reach into Mason County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 49402 also Lake and Oceana counties
- 49405
- 49410
- 49411 also Manistee County
- 49431
- 49449 also Oceana County
- 49454
- 49458
- 49644 also Lake and Manistee counties
- 49660 also Manistee County
Population of Mason County, 2020–2025
Mason County shrank by 19 people (−0.1%) between April 2020 and July 2025: 978 more deaths than births and a net gain of 982 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 29,033 |
| 2021 | 29,344 |
| 2022 | 29,341 |
| 2023 | 29,144 |
| 2024 | 29,063 |
| 2025 | 29,040 |
Neighboring counties
- Oceana County south · 27,177 people
- Manistee County north · 25,656 people
- Lake County east · 13,182 people
- Manitowoc County, Wisconsin west · 81,710 people
- Sheboygan County, Wisconsin west · 118,047 people
- Newaygo County southeast · 51,622 people
Printable Mason 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) (125 KB)
- PNG (2400 px) (75 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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