58 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Center | 1 | 1,767 | 1,780 | 0% | 49 | 36 | Township |
| Center | 2 | 1,767 | 1,774 | 0% | 49 | 36 | Township |
| Smith Center | 3 | 1,567 | 1,579 | -0.13% | 1,275 | 1 | City |
| Smith Center | 4 | 1,567 | 1,574 | -0.13% | 1,275 | 1 | City |
| Cedar | 5 | 556 | 570 | -0.54% | 16 | 36 | Township |
| Cedar | 6 | 556 | 567 | -0.54% | 16 | 36 | Township |
| Cedar | 7 | 472 | 476 | 0% | 13 | 36 | Township |
| Cedar | 8 | 472 | 475 | 0% | 13 | 36 | Township |
| Kensington | 9 | 395 | 400 | -0.25% | 1,179 | 0 | City |
| Kensington | 10 | 395 | 399 | -0.25% | 1,179 | 0 | City |
| Oak | 11 | 232 | 238 | -0.85% | 6 | 36 | Township |
| Oak | 12 | 232 | 237 | -0.85% | 6 | 36 | Township |
| Lebanon | 13 | 180 | 183 | -0.55% | 559 | 0 | City |
| Lebanon | 14 | 180 | 182 | -0.55% | 559 | 0 | City |
| Houston | 15 | 130 | 131 | 0% | 4 | 36 | Township |
| Houston | 16 | 130 | 131 | 0% | 4 | 36 | Township |
| Gaylord | 17 | 83 | 85 | -1.19% | 325 | 0 | City |
| Gaylord | 18 | 83 | 85 | -1.19% | 325 | 0 | City |
| Harvey | 19 | 74 | 76 | 0% | 2 | 36 | Township |
| Harvey | 20 | 74 | 76 | 0% | 2 | 36 | Township |
| Harlan | 21 | 72 | 72 | 0% | 2 | 36 | Township |
| Harlan | 22 | 72 | 72 | 0% | 2 | 36 | Township |
| Cedar | 23 | 67 | 70 | -1.47% | 1 | 55 | Township |
| Cedar | 24 | 67 | 70 | -1.47% | 1 | 55 | Township |
| Valley | 25 | 67 | 65 | 3.08% | 2 | 36 | Township |
| Valley | 26 | 67 | 65 | 3.08% | 2 | 36 | Township |
| Banner | 27 | 62 | 62 | 0% | 2 | 36 | Township |
| Banner | 28 | 62 | 62 | 0% | 2 | 36 | Township |
| Beaver | 29 | 54 | 54 | 0% | 2 | 36 | Township |
| Beaver | 30 | 54 | 54 | 0% | 2 | 36 | Township |
| Webster | 31 | 44 | 44 | 0% | 1 | 36 | Township |
| Webster | 32 | 44 | 44 | 0% | 1 | 36 | Township |
| Athol | 33 | 41 | 41 | 0% | 222 | 0 | City |
| Athol | 34 | 41 | 41 | 0% | 222 | 0 | City |
| Pleasant | 35 | 36 | 36 | 0% | 1 | 36 | Township |
| Pleasant | 36 | 36 | 36 | 0% | 1 | 36 | Township |
| Swan | 37 | 36 | 36 | 0% | 1 | 36 | Township |
| Swan | 38 | 36 | 36 | 0% | 1 | 36 | Township |
| Dor | 39 | 32 | 32 | 0% | 1 | 36 | Township |
| Dor | 40 | 32 | 32 | 0% | 1 | 36 | Township |
| White Rock | 41 | 31 | 31 | 0% | 1 | 36 | Township |
| White Rock | 42 | 31 | 31 | 0% | 1 | 36 | Township |
| German | 43 | 29 | 29 | 0% | 1 | 35 | Township |
| German | 44 | 29 | 29 | 0% | 1 | 35 | Township |
| Cora | 45 | 28 | 28 | 0% | 1 | 36 | Township |
| Cora | 46 | 28 | 28 | 0% | 1 | 36 | Township |
| Blaine | 47 | 27 | 27 | 0% | 1 | 36 | Township |
| Blaine | 48 | 27 | 27 | 0% | 1 | 36 | Township |
| Crystal Plains | 49 | 27 | 27 | 0% | 1 | 36 | Township |
| Crystal Plains | 50 | 27 | 27 | 0% | 1 | 36 | Township |
| Pawnee | 51 | 27 | 27 | 0% | 1 | 36 | Township |
| Pawnee | 52 | 27 | 27 | 0% | 1 | 36 | Township |
| Cedar | 53 | 23 | 24 | 0% | 0.00 | 46 | Township |
| Cedar | 54 | 23 | 24 | 0% | 0.00 | 46 | Township |
| Martin | 55 | 21 | 21 | 0% | 1 | 36 | Township |
| Martin | 56 | 21 | 21 | 0% | 1 | 36 | Township |
| Cedar | 57 | 13 | 13 | 0% | 73 | 0 | City |
| Cedar | 58 | 13 | 13 | 0% | 73 | 0 | City |
Center is the largest city in Smith County, with a population of 1,767.
Cedar is the smallest city in Smith County, with a population of 13.
There are 58 cities in Smith County, Kansas.