27 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jackson | 1 | 30,550 | 31,309 | -0.5% | 2,819 | 10.84 | City |
| Blackman charter township | 2 | 24,881 | 25,654 | -1.11% | 784 | 31.73 | Township |
| Summit township | 3 | 22,652 | 22,873 | -0.14% | 777 | 29.14 | Township |
| Leoni township | 4 | 13,718 | 13,822 | -0.11% | 282 | 48.63 | Township |
| Spring Arbor township | 5 | 8,567 | 8,532 | 0.34% | 244 | 35.12 | Township |
| Columbia township | 6 | 7,443 | 7,379 | 0.12% | 203 | 36.60 | Township |
| Napoleon township | 7 | 6,675 | 6,780 | -0.24% | 230 | 28.99 | Township |
| Grass Lake charter township | 8 | 6,248 | 6,071 | 0.53% | 135 | 46.45 | Township |
| Rives township | 9 | 4,782 | 4,742 | 0.21% | 134 | 35.80 | Township |
| Henrietta township | 10 | 4,731 | 4,676 | 0.4% | 131 | 35.98 | Township |
| Sandstone township | 11 | 3,871 | 3,925 | -0.21% | 108 | 36 | Township |
| Hanover township | 12 | 3,673 | 3,651 | 0.16% | 105 | 34.84 | Township |
| Liberty township | 13 | 3,078 | 3,051 | 0.23% | 90 | 34.27 | Township |
| Waterloo township | 14 | 3,005 | 2,924 | 0.67% | 63 | 47.62 | Township |
| Norvell township | 15 | 2,795 | 2,799 | -0.04% | 95 | 29.55 | Township |
| Concord township | 16 | 2,738 | 2,734 | 0.11% | 77 | 35.73 | Township |
| Tompkins township | 17 | 2,667 | 2,615 | 0.49% | 74 | 36.01 | Township |
| Parma township | 18 | 2,629 | 2,665 | -0.19% | 72 | 36.30 | Township |
| Springport township | 19 | 2,113 | 2,143 | -0.28% | 59 | 36.10 | Township |
| Pulaski township | 20 | 1,876 | 1,886 | -0.05% | 52 | 36.19 | Township |
| Hanover township | 21 | 1,724 | 1,701 | 0.29% | 48 | 35.99 | Township |
| Brooklyn | 22 | 1,405 | 1,360 | 0.65% | 1,498 | 0.94 | Village |
| Grass Lake | 23 | 1,088 | 1,108 | -0.37% | 1,157 | 0.94 | Village |
| Concord | 24 | 1,080 | 1,090 | -0.18% | 723 | 1.49 | Village |
| Springport | 25 | 812 | 829 | -0.37% | 644 | 1.26 | Village |
| Parma | 26 | 761 | 773 | -0.26% | 725 | 1.05 | Village |
| Hanover | 27 | 467 | 479 | -0.43% | 1,112 | 0.42 | Village |
Jackson is the largest city in Jackson County, with a population of 30,550.
Hanover is the smallest city in Jackson County.
There are 27 cities in Jackson County, Michigan.