13 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Trinidad | 1 | 8,144 | 8,339 | -0.48% | 868 | 9 | City |
| Aguilar | 2 | 445 | 454 | -0.45% | 1,135 | 0 | Town |
| Jansen | 3 | 266 | 224 | 3.91% | 227 | 1 | CDP |
| El Moro | 4 | 220 | 380 | 0% | 20 | 11 | CDP |
| Segundo | 5 | 215 | 85 | 6.97% | 310 | 1 | CDP |
| Cokedale | 6 | 128 | 128 | 0% | 624 | 0 | Town |
| Stonewall Gap | 7 | 119 | 37 | 7.21% | 62 | 2 | CDP |
| Hoehne | 8 | 115 | 125 | 0.88% | 37 | 3 | CDP |
| Kim | 9 | 65 | 63 | 0% | 172 | 0 | Town |
| Starkville | 10 | 65 | 65 | 0% | 890 | 0 | Town |
| Branson | 11 | 57 | 55 | 0% | 233 | 0 | Town |
| Weston | 12 | 39 | 16 | 8.33% | 13 | 3 | CDP |
| Lynn | 13 | 13 | 44 | 8.33% | 18 | 1 | CDP |
Trinidad is the largest city in Las Animas County, with a population of 8,144.
Lynn is the smallest city in Las Animas County, with a population of 13.
There are 13 cities in Las Animas County, Colorado.