Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Marion township | 1 | 12,104 | 11,271 | 1.68% | 347 | 34.9 | Township |
| Leroy township | 2 | 3,798 | 3,792 | 0.05% | 111 | 34.1 | Township |
| Leroy township | 3 | 3,687 | 3,659 | 0.16% | 102 | 36.0 | Township |
| Reed City | 4 | 2,532 | 2,487 | 0.44% | 1,205 | 2.1 | City |
| Hersey township | 5 | 1,984 | 1,945 | 0.2% | 56 | 35.3 | Township |
| Evart | 6 | 1,771 | 1,745 | 0.34% | 719 | 2.5 | City |
| Marion township | 7 | 1,654 | 1,656 | -0.24% | 65 | 25.6 | Township |
| Marion township | 8 | 1,592 | 1,564 | 0.19% | 43 | 37.0 | Township |
| Marion township | 9 | 1,557 | 1,568 | -0.32% | 43 | 36.1 | Township |
| Rose Lake township | 10 | 1,456 | 1,407 | 0.55% | 43 | 33.6 | Township |
| Burdell township | 11 | 1,439 | 1,413 | 0.14% | 39 | 37.3 | Township |
| Evart township | 12 | 1,369 | 1,341 | 0.22% | 42 | 32.7 | Township |
| Le Roy township | 13 | 1,285 | 1,251 | 0.39% | 37 | 35.0 | Township |
| Sherman township | 14 | 1,006 | 0 | -0.1% | 27 | 37.0 | Township |
| Marion | 15 | 797 | 783 | 0.38% | 619 | 1.3 | Village |
| Hersey | 16 | 365 | 357 | 0.55% | 332 | 1.1 | Village |
| Tustin | 17 | 258 | 253 | 0.39% | 665 | 0.4 | Village |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Marion township is the largest city in Osceola County.
Tustin is the smallest city in Osceola County.
There are 17 cities in Osceola County, Michigan.