7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Brazil | 1 | 8,279 | 8,158 | 0.24% | 2,245 | 4 | City |
| Clay City | 2 | 888 | 876 | 0.23% | 1,647 | 1 | Town |
| Knightsville | 3 | 691 | 699 | -0.14% | 666 | 1 | Town |
| Harmony | 4 | 670 | 678 | -0.15% | 815 | 1 | Town |
| Staunton | 5 | 467 | 470 | 0% | 1,428 | 0 | Town |
| Carbon | 6 | 257 | 260 | 0% | 1,725 | 0 | Town |
| Center Point | 7 | 209 | 214 | -0.48% | 282 | 1 | Town |
Brazil is the largest city in Clay County, with a population of 8,279.
Center Point is the smallest city in Clay County, with a population of 209.
There are 7 cities in Clay County, Indiana.