| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dallas | 1 | 1,336,440 | 1,303,503 | 0.52% | 3,934 | 340 | City |
| Irving | 2 | 257,513 | 256,886 | 0.17% | 3,845 | 67 | City |
| Garland | 3 | 250,791 | 246,367 | 0.47% | 4,411 | 57 | City |
| Grand Prairie | 4 | 212,266 | 196,185 | 1.35% | 2,776 | 76 | City |
| Mesquite | 5 | 150,903 | 149,620 | 0.14% | 3,073 | 49 | City |
| Carrollton | 6 | 135,107 | 133,598 | 0.41% | 3,686 | 37 | City |
| Richardson | 7 | 118,205 | 119,319 | -0.28% | 4,139 | 29 | City |
| Rowlett | 8 | 69,243 | 62,754 | 1.99% | 3,337 | 21 | City |
| DeSoto | 9 | 56,877 | 56,030 | 0.35% | 2,629 | 22 | City |
| Cedar Hill | 10 | 49,941 | 49,108 | 0.28% | 1,395 | 36 | City |
| Coppell | 11 | 41,133 | 42,831 | -0.61% | 2,852 | 14 | City |
| Lancaster | 12 | 40,430 | 41,253 | -0.24% | 1,223 | 33 | City |
| Farmers Branch | 13 | 38,645 | 36,223 | 0.85% | 3,253 | 12 | City |
| Duncanville | 14 | 38,622 | 40,529 | -0.75% | 3,448 | 11 | City |
| Sachse | 15 | 34,312 | 27,081 | 4.5% | 3,525 | 10 | City |
| Balch Springs | 16 | 27,186 | 27,625 | -0.26% | 3,013 | 9 | City |
| University Park | 17 | 25,359 | 25,252 | 0.14% | 6,880 | 4 | City |
| Seagoville | 18 | 21,471 | 18,551 | 1.87% | 1,142 | 19 | City |
| Glenn Heights | 19 | 21,242 | 16,093 | 4.5% | 2,921 | 7 | City |
| Addison | 20 | 17,247 | 17,091 | 0.3% | 3,962 | 4 | Town |
| Sunnyvale | 21 | 9,268 | 7,823 | 2.89% | 561 | 17 | Town |
| Highland Park | 22 | 8,757 | 8,853 | -0.08% | 3,904 | 2 | Town |
| Hutchins | 23 | 8,401 | 7,224 | 2.38% | 922 | 9 | City |
| Wilmer | 24 | 6,973 | 5,892 | 3.03% | 570 | 12 | City |
| Ovilla | 25 | 4,923 | 4,261 | 2.39% | 851 | 6 | City |
| Cockrell Hill | 26 | 3,610 | 3,790 | -0.77% | 6,203 | 1 | City |
| Combine | 27 | 2,884 | 2,231 | 4.15% | 396 | 7 | City |
| Oak Leaf | 28 | 1,716 | 1,552 | 1.9% | 606 | 3 | City |
| Pecan Hill | 29 | 749 | 729 | 0.4% | 351 | 2 | City |
Dallas is the largest city in Dallas County, with a population of 1,336,440.
Pecan Hill is the smallest city in Dallas County, with a population of 749.
There are 29 cities in Dallas County, Texas.