10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Perry township | 1 | 5,138 | 5,033 | 0.69% | 53 | 96.50 | Township |
| Loogootee | 2 | 2,628 | 2,597 | 0.23% | 1,679 | 1.56 | City |
| Halbert township | 3 | 1,581 | 1,542 | 0.7% | 30 | 51.94 | Township |
| Center township | 4 | 1,506 | 1,478 | 0.6% | 38 | 39.47 | Township |
| Rutherford township | 5 | 739 | 705 | 1.23% | 21 | 34.81 | Township |
| Shoals | 6 | 682 | 676 | 0.15% | 374 | 1.82 | Town |
| Mitcheltree township | 7 | 566 | 555 | 0.53% | 8 | 70.76 | Township |
| Lost River township | 8 | 507 | 496 | 0.6% | 12 | 42.29 | Township |
| Crane | 9 | 164 | 166 | 0% | 1,367 | 0.12 | Town |
| Dover Hill | 10 | 34 | 16 | -12.82% | 44 | 0.78 | CDP |
Perry township is the largest city in Martin County, with a population of 5,138.
Dover Hill is the smallest city in Martin County.
There are 10 cities in Martin County, Indiana.