12 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Warsaw | 1 | 2,398 | 2,215 | 1.31% | 962 | 2 | City |
| Lincoln | 2 | 1,232 | 1,144 | 1.23% | 1,298 | 1 | City |
| Cole Camp | 3 | 1,205 | 1,106 | 1.43% | 925 | 1 | City |
| Lincoln | 4 | 593 | 595 | -0.34% | 12 | 48 | Township |
| Lincoln | 5 | 398 | 391 | -0.25% | 11 | 36 | Township |
| Lincoln | 6 | 289 | 313 | -1.03% | 4 | 66 | Township |
| Lincoln | 7 | 257 | 275 | -1.91% | 5 | 48 | Township |
| Lincoln | 8 | 121 | 120 | 0% | 3 | 42 | Township |
| Lincoln | 9 | 103 | 104 | -0.96% | 3 | 36 | Township |
| Ionia | 10 | 79 | 73 | 1.28% | 534 | 0 | Town |
| Tightwad | 11 | 60 | 59 | 0% | 60 | 1 | Village |
| Gerster | 12 | 19 | 18 | 0% | 235 | 0 | Town |
Warsaw is the largest city in Benton County, with a population of 2,398.
Gerster is the smallest city in Benton County, with a population of 19.
There are 12 cities in Benton County, Missouri.