26 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Warsaw | 1 | 2,367 | 2,212 | 1.28% | 949 | 2 | City |
| Warsaw | 2 | 2,367 | 2,215 | 1.28% | 949 | 2 | City |
| Lincoln | 3 | 1,217 | 1,142 | 1.16% | 1,282 | 1 | City |
| Lincoln | 4 | 1,217 | 1,144 | 1.16% | 1,282 | 1 | City |
| Cole Camp | 5 | 1,188 | 1,103 | 1.37% | 912 | 1 | City |
| Cole Camp | 6 | 1,188 | 1,106 | 1.37% | 912 | 1 | City |
| Lincoln | 7 | 595 | 598 | -0.34% | 12 | 48 | Township |
| Lincoln | 8 | 595 | 595 | -0.34% | 12 | 48 | Township |
| Lincoln | 9 | 399 | 391 | -0.25% | 11 | 36 | Township |
| Lincoln | 10 | 399 | 391 | -0.25% | 11 | 36 | Township |
| Bent Tree Harbor | 11 | 381 | 220 | 7.02% | 184 | 2 | CDP |
| White Branch | 12 | 308 | 225 | 7.32% | 620 | 0 | CDP |
| Lincoln | 13 | 292 | 313 | -1.02% | 4 | 66 | Township |
| Lincoln | 14 | 292 | 313 | -1.02% | 4 | 66 | Township |
| Lincoln | 15 | 262 | 274 | -1.87% | 5 | 48 | Township |
| Lincoln | 16 | 262 | 275 | -1.87% | 5 | 48 | Township |
| Lincoln | 17 | 121 | 120 | 0% | 3 | 42 | Township |
| Lincoln | 18 | 121 | 120 | 0% | 3 | 42 | Township |
| Lincoln | 19 | 104 | 104 | -0.95% | 3 | 36 | Township |
| Lincoln | 20 | 104 | 104 | -0.95% | 3 | 36 | Township |
| Ionia | 21 | 78 | 73 | 1.3% | 527 | 0 | Town |
| Ionia | 22 | 78 | 73 | 1.3% | 527 | 0 | Town |
| Tightwad | 23 | 60 | 59 | 0% | 60 | 1 | Village |
| Tightwad | 24 | 60 | 59 | 0% | 60 | 1 | Village |
| Gerster | 25 | 19 | 18 | 0% | 235 | 0 | Town |
| Gerster | 26 | 19 | 18 | 0% | 235 | 0 | Town |
Warsaw is the largest city in Benton County, with a population of 2,367.
Gerster is the smallest city in Benton County, with a population of 19.
There are 26 cities in Benton County, Missouri.