12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Atlanta | 1 | 5,415 | 5,429 | -0.06% | 433 | 12.50 | City |
| Linden | 2 | 1,807 | 1,821 | -0.17% | 512 | 3.53 | City |
| Hughes Springs | 3 | 1,531 | 1,573 | -0.52% | 614 | 2.49 | City |
| Queen City | 4 | 1,397 | 1,404 | -0.07% | 394 | 3.54 | City |
| McLeod | 5 | 386 | 346 | 7.22% | 141 | 2.74 | CDP |
| Avinger | 6 | 369 | 371 | 0% | 190 | 1.95 | Town |
| Pine Harbor | 7 | 352 | 648 | -8.09% | 106 | 3.33 | CDP |
| Bloomburg | 8 | 334 | 321 | 0.91% | 332 | 1.01 | Town |
| Bivins | 9 | 229 | 183 | 7.01% | 162 | 1.42 | CDP |
| Douglassville | 10 | 210 | 212 | 0% | 33 | 6.33 | Town |
| Marietta | 11 | 112 | 114 | 0% | 194 | 0.58 | Town |
| Domino | 12 | 84 | 71 | 3.7% | 186 | 0.45 | Town |
Atlanta is the largest city in Cass County, with a population of 5,415.
Domino is the smallest city in Cass County.
There are 12 cities in Cass County, Texas.