9 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Atlanta | 1 | 5,456 | 5,432 | 0.07% | 436 | 13 | City |
| Linden | 2 | 1,807 | 1,821 | -0.11% | 512 | 4 | City |
| Hughes Springs | 3 | 1,506 | 1,587 | -0.86% | 604 | 2 | City |
| Queen City | 4 | 1,384 | 1,404 | -0.22% | 391 | 4 | City |
| Avinger | 5 | 375 | 377 | 0% | 193 | 2 | Town |
| Bloomburg | 6 | 336 | 321 | 0.9% | 334 | 1 | Town |
| Douglassville | 7 | 211 | 211 | 0% | 33 | 6 | Town |
| Marietta | 8 | 115 | 114 | 0% | 199 | 1 | Town |
| Domino | 9 | 83 | 71 | 2.47% | 184 | 0 | Town |
Atlanta is the largest city in Cass County, with a population of 5,456.
Domino is the smallest city in Cass County, with a population of 83.
There are 9 cities in Cass County, Texas.