26 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hillsdale | 1 | 7,974 | 8,034 | -0.15% | 1,400 | 5.69 | City |
| Jerome township | 2 | 4,659 | 4,624 | 0.32% | 143 | 32.63 | Township |
| Somerset township | 3 | 4,572 | 4,590 | -0.15% | 137 | 33.43 | Township |
| Jefferson township | 4 | 3,004 | 3,016 | -0.23% | 85 | 35.49 | Township |
| Cambria township | 5 | 2,521 | 2,543 | -0.32% | 72 | 34.80 | Township |
| Adams township | 6 | 2,304 | 2,326 | -0.3% | 65 | 35.63 | Township |
| Jonesville | 7 | 2,162 | 2,184 | -0.18% | 774 | 2.79 | City |
| Camden township | 8 | 2,063 | 2,074 | -0.19% | 49 | 42.36 | Township |
| Hillsdale township | 9 | 1,983 | 2,002 | -0.3% | 157 | 12.59 | Township |
| Scipio township | 10 | 1,841 | 1,842 | -0.16% | 63 | 29.21 | Township |
| Reading township | 11 | 1,708 | 1,731 | -0.41% | 50 | 33.98 | Township |
| Wright township | 12 | 1,592 | 1,616 | -0.44% | 37 | 43.35 | Township |
| Allen township | 13 | 1,588 | 1,603 | -0.31% | 44 | 36.01 | Township |
| Pittsford township | 14 | 1,517 | 1,535 | -0.39% | 43 | 35.42 | Township |
| Litchfield | 15 | 1,378 | 1,393 | -0.22% | 496 | 2.78 | City |
| Moscow township | 16 | 1,367 | 1,376 | -0.22% | 39 | 35.14 | Township |
| Wheatland township | 17 | 1,326 | 1,339 | -0.38% | 37 | 35.65 | Township |
| Woodbridge township | 18 | 1,299 | 1,314 | -0.38% | 43 | 30.05 | Township |
| Amboy township | 19 | 1,166 | 1,176 | -0.26% | 39 | 29.96 | Township |
| Fayette township | 20 | 1,095 | 1,107 | -0.36% | 55 | 20.01 | Township |
| Reading | 21 | 1,079 | 1,093 | -0.28% | 1,066 | 1.01 | City |
| Litchfield township | 22 | 1,015 | 1,026 | -0.39% | 31 | 32.70 | Township |
| Waldron | 23 | 547 | 554 | -0.18% | 547 | 1 | Village |
| Camden | 24 | 516 | 516 | 0% | 644 | 0.80 | Village |
| North Adams | 25 | 465 | 470 | -0.21% | 874 | 0.53 | Village |
| Allen | 26 | 217 | 222 | -0.46% | 1,247 | 0.17 | Village |
Hillsdale is the largest city in Hillsdale County, with a population of 7,974.
Allen is the smallest city in Hillsdale County.
There are 26 cities in Hillsdale County, Michigan.