| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Idabel | 1 | 6,934 | 6,965 | 0% | 417 | 17 | City |
| Broken Bow | 2 | 4,214 | 4,184 | 0.07% | 688 | 6 | City |
| Valliant | 3 | 794 | 816 | -0.5% | 412 | 2 | Town |
| Wright City | 4 | 595 | 611 | -0.5% | 672 | 1 | Town |
| Haworth | 5 | 279 | 280 | -0.36% | 174 | 2 | Town |
| Hochatown | 6 | 267 | 270 | -0.37% | 24 | 11 | Town |
| Millerton | 7 | 212 | 214 | -0.47% | 131 | 2 | Town |
| Garvin | 8 | 177 | 180 | -0.56% | 93 | 2 | Town |
Idabel is the largest city in McCurtain County, with a population of 6,934.
Garvin is the smallest city in McCurtain County, with a population of 177.
There are 8 cities in McCurtain County, Oklahoma.