18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| White River | 1 | 7,129 | 7,167 | -0.11% | 96 | 74 | Township |
| Winchester | 2 | 4,794 | 4,823 | -0.13% | 1,386 | 3 | City |
| Wayne | 3 | 4,337 | 4,355 | -0.12% | 109 | 40 | Township |
| Union City | 4 | 3,432 | 3,444 | -0.09% | 1,521 | 2 | City |
| Union | 5 | 1,938 | 1,948 | -0.15% | 27 | 72 | Township |
| Parker City | 6 | 1,270 | 1,275 | -0.08% | 2,209 | 1 | Town |
| Farmland | 7 | 1,259 | 1,263 | -0.08% | 2,371 | 1 | Town |
| Greensfork | 8 | 1,056 | 1,054 | 0.09% | 23 | 46 | Township |
| Ward | 9 | 1,033 | 1,038 | 0.1% | 28 | 37 | Township |
| Green | 10 | 985 | 988 | -0.2% | 33 | 29 | Township |
| Lynn | 11 | 944 | 953 | -0.21% | 1,671 | 1 | Town |
| Stoney Creek | 12 | 864 | 866 | -0.12% | 32 | 27 | Township |
| Lynn | 13 | 820 | 821 | 0.12% | 19 | 44 | Township |
| Ridgeville | 14 | 687 | 687 | 0% | 1,238 | 1 | Town |
| Jackson | 15 | 544 | 547 | 0% | 18 | 30 | Township |
| Saratoga | 16 | 229 | 231 | -0.43% | 864 | 0 | Town |
| Losantville | 17 | 218 | 220 | -0.46% | 1,153 | 0 | Town |
| Modoc | 18 | 157 | 159 | -0.63% | 1,524 | 0 | Town |
White River is the largest city in Randolph County, with a population of 7,129.
Modoc is the smallest city in Randolph County, with a population of 157.
There are 18 cities in Randolph County, Indiana.