39 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Adrian | 1 | 19,985 | 20,617 | -0.63% | 2,496 | 8.01 | City |
| Tecumseh | 2 | 8,546 | 8,670 | -0.29% | 1,513 | 5.65 | City |
| Raisin township | 3 | 8,105 | 7,907 | 0.62% | 224 | 36.16 | Township |
| Madison charter township | 4 | 6,520 | 8,431 | -7.46% | 215 | 30.38 | Township |
| Adrian township | 5 | 6,261 | 6,403 | -0.33% | 184 | 33.94 | Township |
| Addison township | 6 | 6,211 | 6,246 | -0.11% | 175 | 35.52 | Township |
| Deerfield township | 7 | 5,787 | 5,758 | 0.19% | 162 | 35.62 | Township |
| Cambridge township | 8 | 5,744 | 5,727 | 0.3% | 180 | 31.88 | Township |
| Deerfield township | 9 | 4,117 | 4,163 | -0.48% | 114 | 36.17 | Township |
| Blissfield township | 10 | 3,805 | 3,913 | -0.5% | 182 | 20.88 | Township |
| Clinton township | 11 | 3,694 | 3,757 | -0.22% | 203 | 18.17 | Township |
| Woodstock township | 12 | 3,566 | 3,609 | -0.14% | 105 | 33.89 | Township |
| Deerfield township | 13 | 3,339 | 3,256 | 0.3% | 94 | 35.45 | Township |
| Blissfield | 14 | 3,226 | 3,318 | -0.56% | 1,455 | 2.22 | Village |
| Rollin township | 15 | 2,993 | 3,037 | -0.37% | 89 | 33.69 | Township |
| Clinton | 16 | 2,462 | 2,524 | -0.48% | 1,342 | 1.83 | Village |
| Hudson | 17 | 2,325 | 2,417 | -0.77% | 1,061 | 2.19 | City |
| Morenci | 18 | 2,190 | 2,270 | -0.73% | 1,033 | 2.12 | City |
| Tecumseh township | 19 | 2,012 | 2,044 | -0.15% | 160 | 12.61 | Township |
| Palmyra township | 20 | 1,987 | 2,021 | -0.3% | 54 | 36.49 | Township |
| Deerfield township | 21 | 1,887 | 1,786 | 0.96% | 53 | 35.70 | Township |
| Rome township | 22 | 1,760 | 1,818 | -0.56% | 49 | 35.85 | Township |
| Dover township | 23 | 1,635 | 1,664 | -0.3% | 47 | 35.08 | Township |
| Fairfield township | 24 | 1,635 | 1,664 | -0.3% | 39 | 42.05 | Township |
| Hudson township | 25 | 1,511 | 1,496 | 0.33% | 43 | 35.38 | Township |
| Riga township | 26 | 1,480 | 1,287 | 2.78% | 36 | 40.85 | Township |
| Ridgeway township | 27 | 1,475 | 1,528 | -0.54% | 51 | 28.69 | Township |
| Deerfield township | 28 | 1,453 | 1,500 | -0.55% | 58 | 25.01 | Township |
| Macon township | 29 | 1,281 | 1,317 | -0.47% | 39 | 32.65 | Township |
| Seneca township | 30 | 1,102 | 1,142 | -0.63% | 28 | 40.06 | Township |
| Jasper township | 31 | 1,092 | 1,065 | 0.37% | 30 | 35.92 | Township |
| Medina township | 32 | 1,075 | 1,115 | -0.65% | 23 | 47.54 | Township |
| Clayton township | 33 | 1,024 | 1,001 | 0.39% | 32 | 32.06 | Township |
| Onsted | 34 | 994 | 1,001 | -0.1% | 932 | 1.07 | Village |
| Deerfield | 35 | 875 | 910 | -0.79% | 924 | 0.95 | Village |
| Addison | 36 | 580 | 600 | -0.69% | 607 | 0.95 | Village |
| Britton | 37 | 550 | 574 | -0.9% | 695 | 0.79 | Village |
| Cement City | 38 | 407 | 421 | -0.73% | 457 | 0.89 | Village |
| Clayton | 39 | 310 | 325 | -0.96% | 432 | 0.72 | Village |
Adrian is the largest city in Lenawee County, with a population of 19,985.
Clayton is the smallest city in Lenawee County.
There are 39 cities in Lenawee County, Michigan.