| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rockwall | 1 | 55,420 | 47,740 | 2.67% | 1,873 | 30 | City |
| Royse City | 2 | 31,461 | 13,780 | 11.14% | 1,477 | 21 | City |
| Fate | 3 | 31,251 | 18,428 | 7.74% | 2,566 | 12 | City |
| Heath | 4 | 12,103 | 9,744 | 3.7% | 979 | 12 | City |
| McLendon-Chisholm | 5 | 6,034 | 3,663 | 7.19% | 480 | 13 | City |
Rockwall is the largest city in Rockwall County, with a population of 55,420.
McLendon-Chisholm is the smallest city in Rockwall County, with a population of 6,034.
There are 5 cities in Rockwall County, Texas.