9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Syracuse township | 1 | 2,009 | 2,082 | -0.69% | 25 | 81.24 | Township |
| Syracuse | 2 | 1,740 | 1,807 | -0.74% | 424 | 4.10 | City |
| Coolidge township | 3 | 109 | 108 | 0.93% | 1 | 115.05 | Township |
| Coolidge | 4 | 79 | 79 | 0% | 171 | 0.46 | City |
| Kendall township | 5 | 77 | 83 | -1.28% | 0.00 | 190.57 | Township |
| Kendall township | 6 | 71 | 72 | 0% | 1 | 90.49 | Township |
| Bear Creek township | 7 | 53 | 54 | -1.85% | 0.00 | 174.23 | Township |
| Medway township | 8 | 40 | 43 | -2.44% | 0.00 | 107.59 | Township |
| Richland township | 9 | 26 | 27 | 0% | 0.00 | 164.40 | Township |
Syracuse township is the largest city in Hamilton County, with a population of 2,009.
Richland township is the smallest city in Hamilton County.
There are 9 cities in Hamilton County, Kansas.