31 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dallas | 1 | 1,302,638 | 1,303,212 | -0.01% | 3,835 | 339.68 | City |
| Irving | 2 | 252,750 | 256,807 | -0.32% | 3,774 | 66.98 | City |
| Garland | 3 | 241,576 | 246,311 | -0.39% | 4,249 | 56.86 | City |
| Grand Prairie | 4 | 206,053 | 196,255 | 0.96% | 2,842 | 72.51 | City |
| Mesquite | 5 | 145,777 | 149,627 | -0.53% | 2,969 | 49.10 | City |
| Carrollton | 6 | 132,495 | 133,552 | -0.16% | 3,615 | 36.65 | City |
| Richardson | 7 | 116,192 | 119,299 | -0.53% | 4,068 | 28.56 | City |
| Rowlett | 8 | 69,511 | 62,766 | 1.98% | 3,350 | 20.75 | City |
| DeSoto | 9 | 55,525 | 56,062 | -0.19% | 2,566 | 21.64 | City |
| Cedar Hill | 10 | 47,947 | 49,106 | -0.48% | 1,340 | 35.79 | City |
| Coppell | 11 | 40,446 | 42,840 | -1.17% | 2,804 | 14.42 | City |
| Lancaster | 12 | 39,521 | 41,255 | -0.87% | 1,195 | 33.06 | City |
| Duncanville | 13 | 37,787 | 40,526 | -1.43% | 3,373 | 11.20 | City |
| Farmers Branch | 14 | 37,383 | 36,218 | 0.63% | 3,146 | 11.88 | City |
| Sachse | 15 | 35,766 | 27,086 | 5.1% | 3,675 | 9.73 | City |
| Balch Springs | 16 | 26,103 | 27,622 | -1.15% | 2,893 | 9.02 | City |
| University Park | 17 | 24,764 | 25,239 | -0.38% | 6,718 | 3.69 | City |
| Glenn Heights | 18 | 20,625 | 16,044 | 4.65% | 2,836 | 7.27 | City |
| Seagoville | 19 | 20,369 | 18,554 | 1.81% | 1,083 | 18.81 | City |
| Addison | 20 | 17,107 | 17,089 | 0.02% | 3,930 | 4.35 | Town |
| Sunnyvale | 21 | 8,924 | 7,829 | 2.52% | 540 | 16.53 | Town |
| Highland Park | 22 | 8,504 | 8,849 | -0.8% | 3,791 | 2.24 | Town |
| Wilmer | 23 | 6,905 | 5,604 | 3.91% | 614 | 11.24 | City |
| Hutchins | 24 | 6,503 | 5,618 | 2.8% | 714 | 9.11 | City |
| Ovilla | 25 | 4,965 | 4,325 | 2.65% | 858 | 5.79 | City |
| Cockrell Hill | 26 | 3,529 | 3,788 | -1.45% | 6,064 | 0.58 | City |
| Combine | 27 | 2,821 | 2,255 | 4.17% | 388 | 7.28 | City |
| Bear Creek Ranch | 28 | 2,736 | 1,349 | 7.13% | 4,545 | 0.60 | CDP |
| Oak Leaf | 29 | 1,759 | 1,558 | 2.33% | 744 | 2.36 | City |
| Pecan Hill | 30 | 748 | 732 | 0.4% | 351 | 2.13 | City |
| Mesquite | 31 | 55 | 163 | -35.29% | 1,100 | 0.05 | CDP |
Dallas is the largest city in Dallas County, with a population of 1,302,638.
Mesquite is the smallest city in Dallas County.
There are 31 cities in Dallas County, Texas.