| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jackson | 1 | 30,898 | 31,310 | -0.4% | 2,868 | 11 | City |
| Blackman | 2 | 24,587 | 25,644 | -1.6% | 775 | 32 | Township |
| Summit | 3 | 22,685 | 22,865 | -0.09% | 778 | 29 | Township |
| Leoni | 4 | 13,774 | 13,821 | 0.07% | 283 | 49 | Township |
| Spring Arbor | 5 | 8,537 | 8,533 | 0.13% | 243 | 35 | Township |
| Columbia | 6 | 7,572 | 7,370 | 0.76% | 207 | 37 | Township |
| Napoleon | 7 | 6,693 | 6,776 | -0.19% | 231 | 29 | Township |
| Grass Lake | 8 | 6,314 | 6,075 | 0.65% | 136 | 46 | Township |
| Rives | 9 | 4,796 | 4,755 | 0.04% | 134 | 36 | Township |
| Henrietta | 10 | 4,759 | 4,673 | 0.63% | 132 | 36 | Township |
| Sandstone | 11 | 3,864 | 3,926 | -0.23% | 107 | 36 | Township |
| Hanover | 12 | 3,715 | 3,653 | 0.19% | 107 | 35 | Township |
| Liberty | 13 | 3,080 | 3,047 | 0% | 90 | 34 | Township |
| Waterloo | 14 | 3,009 | 2,924 | 0.47% | 63 | 48 | Township |
| Norvell | 15 | 2,829 | 2,803 | 0.25% | 96 | 30 | Township |
| Concord | 16 | 2,731 | 2,702 | 0.37% | 76 | 36 | Township |
| Parma | 17 | 2,673 | 2,696 | 0.11% | 74 | 36 | Township |
| Tompkins | 18 | 2,646 | 2,607 | 0.19% | 73 | 36 | Township |
| Springport | 19 | 2,146 | 2,149 | 0.19% | 59 | 36 | Township |
| Pulaski | 20 | 1,878 | 1,886 | -0.05% | 52 | 36 | Township |
| Hanover | 21 | 1,733 | 1,703 | 0.23% | 48 | 36 | Township |
| Brooklyn | 22 | 1,461 | 1,370 | 0.76% | 1,558 | 1 | Village |
| Grass Lake | 23 | 1,095 | 1,110 | -0.27% | 1,165 | 1 | Village |
| Concord | 24 | 1,081 | 1,090 | -0.18% | 724 | 1 | Village |
| Horton | 25 | 937 | 911 | 0.43% | 26 | 35 | Township |
| Springport | 26 | 819 | 829 | -0.24% | 650 | 1 | Village |
| Parma | 27 | 758 | 771 | -0.26% | 722 | 1 | Village |
| Hanover | 28 | 467 | 479 | -0.43% | 1,112 | 0 | Village |
Jackson is the largest city in Jackson County, with a population of 30,898.
Hanover is the smallest city in Jackson County, with a population of 467.
There are 28 cities in Jackson County, Michigan.