9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Center | 1 | 9,445 | 9,383 | 0.12% | 262 | 36 | Township |
| Center | 2 | 9,445 | 9,366 | 0.12% | 262 | 36 | Township |
| New London | 3 | 987 | 937 | 1.02% | 1,422 | 1 | City |
| New London | 4 | 987 | 937 | 1.02% | 1,422 | 1 | City |
| Perry | 5 | 688 | 666 | 0.58% | 497 | 1 | City |
| Perry | 6 | 688 | 668 | 0.58% | 497 | 1 | City |
| Center | 7 | 540 | 534 | 0.19% | 1,324 | 0 | City |
| Center | 8 | 540 | 534 | 0.19% | 1,324 | 0 | City |
| Saverton | 9 | 110 | 118 | 6.8% | 114 | 1 | CDP |
Center is the largest city in Ralls County, with a population of 9,445.
Saverton is the smallest city in Ralls County, with a population of 110.
There are 9 cities in Ralls County, Missouri.