12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Atlanta | 1 | 5,452 | 5,432 | 0.07% | 436 | 13 | City |
| Linden | 2 | 1,809 | 1,821 | -0.17% | 512 | 4 | City |
| Hughes Springs | 3 | 1,519 | 1,587 | -0.91% | 609 | 2 | City |
| Queen City | 4 | 1,387 | 1,404 | -0.29% | 391 | 4 | City |
| McLeod | 5 | 386 | 346 | 7.22% | 141 | 3 | CDP |
| Avinger | 6 | 375 | 377 | -0.27% | 193 | 2 | Town |
| Pine Harbor | 7 | 352 | 648 | -8.09% | 106 | 3 | CDP |
| Bloomburg | 8 | 333 | 321 | 0.6% | 331 | 1 | Town |
| Bivins | 9 | 229 | 183 | 7.01% | 162 | 1 | CDP |
| Douglassville | 10 | 211 | 211 | 0% | 33 | 6 | Town |
| Marietta | 11 | 115 | 114 | 0% | 199 | 1 | Town |
| Domino | 12 | 81 | 71 | 2.53% | 179 | 0 | Town |
Atlanta is the largest city in Cass County, with a population of 5,452.
Domino is the smallest city in Cass County, with a population of 81.
There are 12 cities in Cass County, Texas.