4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Center | 1 | 9,456 | 9,366 | 0.12% | 262 | 36 | Township |
| New London | 2 | 997 | 937 | 1.01% | 1,437 | 1 | City |
| Perry | 3 | 692 | 668 | 0.58% | 500 | 1 | City |
| Center | 4 | 541 | 534 | 0.19% | 1,326 | 0 | City |
Center is the largest city in Ralls County, with a population of 9,456.
Center is the smallest city in Ralls County, with a population of 541.
There are 4 cities in Ralls County, Missouri.