28 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jackson | 1 | 30,823 | 31,307 | -0.31% | 2,861 | 11 | City |
| Blackman charter | 2 | 25,506 | 25,658 | 0.03% | 804 | 32 | Township |
| Summit | 3 | 22,837 | 22,874 | 0.12% | 784 | 29 | Township |
| Leoni | 4 | 13,856 | 13,825 | 0.25% | 285 | 49 | Township |
| Spring Arbor | 5 | 8,563 | 8,525 | 0.34% | 244 | 35 | Township |
| Columbia | 6 | 7,562 | 7,378 | 0.8% | 207 | 37 | Township |
| Napoleon | 7 | 6,765 | 6,779 | 0.16% | 233 | 29 | Township |
| Grass Lake charter | 8 | 6,312 | 6,073 | 0.83% | 136 | 46 | Township |
| Rives | 9 | 4,827 | 4,744 | 0.37% | 135 | 36 | Township |
| Henrietta | 10 | 4,750 | 4,677 | 0.49% | 132 | 36 | Township |
| Sandstone | 11 | 3,898 | 3,923 | 0.08% | 108 | 36 | Township |
| Hanover | 12 | 3,758 | 3,650 | 1.18% | 108 | 35 | Township |
| Liberty | 13 | 3,109 | 3,047 | 0.65% | 91 | 34 | Township |
| Waterloo | 14 | 3,024 | 2,925 | 0.8% | 64 | 48 | Township |
| Norvell | 15 | 2,830 | 2,799 | 0.35% | 96 | 30 | Township |
| Concord | 16 | 2,767 | 2,732 | 0.47% | 77 | 36 | Township |
| Tompkins | 17 | 2,675 | 2,615 | 0.68% | 74 | 36 | Township |
| Parma | 18 | 2,645 | 2,663 | 0.08% | 73 | 36 | Township |
| Springport | 19 | 2,147 | 2,142 | 0.37% | 59 | 36 | Township |
| Pulaski | 20 | 1,890 | 1,887 | 0.16% | 52 | 36 | Township |
| Hanover | 21 | 1,729 | 1,698 | 0.41% | 48 | 36 | Township |
| Brooklyn | 22 | 1,438 | 1,372 | 0.91% | 1,533 | 1 | Village |
| Grass Lake | 23 | 1,099 | 1,109 | -0.18% | 1,169 | 1 | Village |
| Concord | 24 | 1,087 | 1,089 | -0.09% | 728 | 1 | Village |
| Horton | 25 | 914 | 903 | 0.11% | 26 | 35 | Township |
| Springport | 26 | 821 | 829 | -0.24% | 652 | 1 | Village |
| Parma | 27 | 763 | 772 | -0.26% | 727 | 1 | Village |
| Hanover | 28 | 472 | 479 | -0.42% | 1,124 | 0 | Village |
Jackson is the largest city in Jackson County, with a population of 30,823.
Hanover is the smallest city in Jackson County, with a population of 472.
There are 28 cities in Jackson County, Michigan.