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 |
|---|---|---|---|---|---|---|---|
| Ontwa township | 1 | 6,838 | 6,898 | -0.03% | 352 | 19.4 | Township |
| Howard township | 2 | 6,252 | 6,257 | -0.21% | 181 | 34.5 | Township |
| Dowagiac | 3 | 5,659 | 5,713 | -0.25% | 1,271 | 4.5 | City |
| Porter township | 4 | 3,931 | 3,754 | 0.23% | 76 | 51.5 | Township |
| LaGrange township | 5 | 3,747 | 3,782 | -0.16% | 113 | 33.2 | Township |
| Milton township | 6 | 3,217 | 3,132 | 1.07% | 152 | 21.1 | Township |
| Silver Creek township | 7 | 3,036 | 3,056 | 0.17% | 95 | 32.0 | Township |
| Union township | 8 | 2,874 | 2,955 | -1.54% | 81 | 35.5 | Township |
| Jefferson township | 9 | 2,578 | 2,589 | 0.12% | 74 | 34.7 | Township |
| Marcellus township | 10 | 2,445 | 2,401 | 0.49% | 74 | 33.2 | Township |
| Pokagon township | 11 | 2,081 | 2,114 | -0.19% | 61 | 34.0 | Township |
| Calvin township | 12 | 2,017 | 1,996 | 0.85% | 59 | 34.3 | Township |
| Penn township | 13 | 1,762 | 1,755 | 0.29% | 52 | 33.6 | Township |
| Cassopolis | 14 | 1,712 | 1,736 | -0.35% | 851 | 2.0 | Village |
| Newberg township | 15 | 1,600 | 1,607 | 0.06% | 46 | 34.5 | Township |
| Edwardsburg | 16 | 1,283 | 1,309 | -0.54% | 1,404 | 0.9 | Village |
| Volinia township | 17 | 1,133 | 1,091 | 1.61% | 33 | 34.4 | Township |
| Marcellus | 18 | 1,042 | 1,070 | -0.67% | 1,528 | 0.7 | Village |
| Vandalia | 19 | 323 | 331 | -0.61% | 327 | 1.0 | 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.
Ontwa township is the largest city in Cass County.
Vandalia is the smallest city in Cass County.
There are 19 cities in Cass County, Michigan.