29 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dallas | 1 | 1,337,417 | 1,303,426 | 0.43% | 3,937 | 340 | City |
| Irving | 2 | 258,636 | 256,907 | 0.11% | 3,861 | 67 | City |
| Garland | 3 | 252,450 | 246,392 | 0.4% | 4,440 | 57 | City |
| Grand Prairie | 4 | 212,896 | 196,201 | 1.32% | 2,784 | 76 | City |
| Mesquite | 5 | 150,391 | 149,637 | 0.08% | 3,063 | 49 | City |
| Carrollton | 6 | 136,403 | 133,562 | 0.35% | 3,721 | 37 | City |
| Richardson | 7 | 117,677 | 119,308 | -0.23% | 4,120 | 29 | City |
| Rowlett | 8 | 70,800 | 62,769 | 1.93% | 3,412 | 21 | City |
| DeSoto | 9 | 57,047 | 56,039 | 0.3% | 2,637 | 22 | City |
| Cedar Hill | 10 | 49,873 | 49,108 | 0.26% | 1,394 | 36 | City |
| Coppell | 11 | 41,257 | 42,841 | -0.64% | 2,860 | 14 | City |
| Lancaster | 12 | 40,539 | 41,261 | -0.3% | 1,226 | 33 | City |
| Duncanville | 13 | 38,538 | 40,533 | -0.85% | 3,440 | 11 | City |
| Farmers Branch | 14 | 37,901 | 36,221 | 0.74% | 3,190 | 12 | City |
| Sachse | 15 | 35,970 | 27,083 | 4.29% | 3,696 | 10 | City |
| Balch Springs | 16 | 27,146 | 27,629 | -0.29% | 3,008 | 9 | City |
| University Park | 17 | 25,281 | 25,241 | 0.03% | 6,859 | 4 | City |
| Glenn Heights | 18 | 21,588 | 16,079 | 4.44% | 2,969 | 7 | City |
| Seagoville | 19 | 20,909 | 18,554 | 1.92% | 1,112 | 19 | City |
| Addison | 20 | 17,340 | 17,090 | 0.24% | 3,983 | 4 | Town |
| Sunnyvale | 21 | 9,347 | 7,822 | 2.79% | 565 | 17 | Town |
| Highland Park | 22 | 8,719 | 8,848 | -0.24% | 3,887 | 2 | Town |
| Hutchins | 23 | 8,380 | 7,227 | 2.34% | 920 | 9 | City |
| Wilmer | 24 | 7,207 | 5,908 | 3.1% | 589 | 12 | City |
| Ovilla | 25 | 4,997 | 4,319 | 2.31% | 864 | 6 | City |
| Cockrell Hill | 26 | 3,598 | 3,789 | -0.88% | 6,182 | 1 | City |
| Combine | 27 | 2,946 | 2,259 | 4.06% | 405 | 7 | City |
| Oak Leaf | 28 | 1,749 | 1,557 | 1.86% | 617 | 3 | City |
| Pecan Hill | 29 | 756 | 731 | 0.53% | 355 | 2 | City |
Dallas is the largest city in Dallas County, with a population of 1,337,417.
Pecan Hill is the smallest city in Dallas County, with a population of 756.
There are 29 cities in Dallas County, Texas.