12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mount Ayr | 1 | 1,614 | 1,622 | -0.12% | 598 | 3 | City |
| Diagonal | 2 | 329 | 336 | -0.6% | 360 | 1 | City |
| Kellerton | 3 | 240 | 243 | -0.41% | 372 | 1 | City |
| Tingley | 4 | 147 | 140 | 0.68% | 215 | 1 | City |
| Sun Valley Lake | 5 | 124 | 188 | -1.59% | 60 | 2 | CDP |
| Redding | 6 | 63 | 65 | -1.56% | 64 | 1 | City |
| Benton | 7 | 39 | 41 | -2.5% | 52 | 1 | City |
| Delphos | 8 | 39 | 44 | 8.33% | 175 | 0 | CDP |
| Maloy | 9 | 26 | 26 | 0% | 42 | 1 | City |
| Ellston | 10 | 23 | 23 | 0% | 92 | 0 | City |
| Beaconsfield | 11 | 14 | 14 | 0% | 19 | 1 | City |
| Athelstan | 12 | 4 | 4 | 0% | 31 | 0 | CDP |
Mount Ayr is the largest city in Ringgold County, with a population of 1,614.
Athelstan is the smallest city in Ringgold County, with a population of 4.
There are 12 cities in Ringgold County, Iowa.