29 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dallas | 1 | 1,331,752 | 1,303,426 | 0.43% | 3,921 | 340 | City |
| Irving | 2 | 258,348 | 256,907 | 0.11% | 3,857 | 67 | City |
| Garland | 3 | 251,440 | 246,392 | 0.4% | 4,422 | 57 | City |
| Grand Prairie | 4 | 210,113 | 196,201 | 1.34% | 2,748 | 76 | City |
| Mesquite | 5 | 150,265 | 149,637 | 0.08% | 3,060 | 49 | City |
| Carrollton | 6 | 135,929 | 133,562 | 0.35% | 3,708 | 37 | City |
| Richardson | 7 | 117,949 | 119,308 | -0.23% | 4,130 | 29 | City |
| Rowlett | 8 | 69,461 | 62,769 | 1.96% | 3,348 | 21 | City |
| DeSoto | 9 | 56,879 | 56,039 | 0.3% | 2,629 | 22 | City |
| Cedar Hill | 10 | 49,745 | 49,108 | 0.26% | 1,390 | 36 | City |
| Coppell | 11 | 41,521 | 42,841 | -0.63% | 2,879 | 14 | City |
| Lancaster | 12 | 40,659 | 41,261 | -0.3% | 1,230 | 33 | City |
| Duncanville | 13 | 38,870 | 40,533 | -0.85% | 3,470 | 11 | City |
| Farmers Branch | 14 | 37,621 | 36,221 | 0.75% | 3,166 | 12 | City |
| Sachse | 15 | 34,489 | 27,083 | 4.49% | 3,544 | 10 | City |
| Balch Springs | 16 | 27,226 | 27,629 | -0.3% | 3,017 | 9 | City |
| University Park | 17 | 25,274 | 25,241 | 0.02% | 6,857 | 4 | City |
| Glenn Heights | 18 | 20,670 | 16,079 | 4.65% | 2,842 | 7 | City |
| Seagoville | 19 | 20,516 | 18,554 | 1.95% | 1,091 | 19 | City |
| Addison | 20 | 17,298 | 17,090 | 0.24% | 3,974 | 4 | Town |
| Sunnyvale | 21 | 9,093 | 7,822 | 2.87% | 550 | 17 | Town |
| Highland Park | 22 | 8,740 | 8,848 | -0.25% | 3,897 | 2 | Town |
| Hutchins | 23 | 8,188 | 7,227 | 2.4% | 899 | 9 | City |
| Wilmer | 24 | 6,990 | 5,908 | 3.19% | 571 | 12 | City |
| Ovilla | 25 | 4,884 | 4,319 | 2.37% | 844 | 6 | City |
| Cockrell Hill | 26 | 3,630 | 3,789 | -0.87% | 6,237 | 1 | City |
| Combine | 27 | 2,831 | 2,259 | 4.2% | 389 | 7 | City |
| Oak Leaf | 28 | 1,717 | 1,557 | 1.9% | 606 | 3 | City |
| Pecan Hill | 29 | 752 | 731 | 0.53% | 353 | 2 | City |
Dallas is the largest city in Dallas County, with a population of 1,331,752.
Pecan Hill is the smallest city in Dallas County, with a population of 752.
There are 29 cities in Dallas County, Texas.