13 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Trinidad | 1 | 8,134 | 8,339 | -0.5% | 867 | 9.38 | City |
| Aguilar | 2 | 445 | 454 | -0.45% | 1,135 | 0.39 | Town |
| Jansen | 3 | 266 | 224 | 3.91% | 227 | 1.17 | CDP |
| El Moro | 4 | 220 | 380 | 0% | 20 | 11.09 | CDP |
| Segundo | 5 | 215 | 85 | 6.97% | 310 | 0.69 | CDP |
| Cokedale | 6 | 127 | 126 | 0% | 620 | 0.20 | Town |
| Stonewall Gap | 7 | 119 | 37 | 7.21% | 62 | 1.92 | CDP |
| Hoehne | 8 | 115 | 125 | 0.88% | 37 | 3.11 | CDP |
| Starkville | 9 | 64 | 66 | 0% | 877 | 0.07 | Town |
| Kim | 10 | 63 | 62 | 0% | 166 | 0.38 | Town |
| Branson | 11 | 58 | 55 | 1.75% | 237 | 0.24 | Town |
| Weston | 12 | 39 | 16 | 8.33% | 13 | 3.10 | CDP |
| Lynn | 13 | 13 | 44 | 8.33% | 18 | 0.72 | CDP |
Trinidad is the largest city in Las Animas County, with a population of 8,134.
Lynn is the smallest city in Las Animas County.
There are 13 cities in Las Animas County, Colorado.