14 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bastrop | 1 | 13,452 | 9,792 | 5.75% | 1,458 | 9 | City |
| Elgin | 2 | 13,097 | 9,802 | 5.3% | 1,923 | 7 | City |
| Hornsby Bend | 3 | 12,091 | 8,553 | 3.01% | 1,286 | 9 | CDP |
| Camp Swift | 4 | 7,039 | 6,529 | 0.61% | 583 | 12 | CDP |
| Cedar Creek | 5 | 4,938 | 3,427 | 7.16% | 274 | 18 | CDP |
| Wyldwood | 6 | 4,834 | 3,615 | 3.33% | 427 | 11 | CDP |
| Smithville | 7 | 4,400 | 4,072 | 1.5% | 1,084 | 4 | City |
| Circle D-KC Estates | 8 | 2,527 | 2,761 | 0.36% | 272 | 9 | CDP |
| Garfield | 9 | 2,094 | 2,506 | 1.26% | 175 | 12 | CDP |
| Rosanky | 10 | 1,859 | 1,225 | 7.15% | 91 | 20 | CDP |
| McDade | 11 | 1,540 | 1,285 | 3.84% | 377 | 4 | CDP |
| Red Rock | 12 | 841 | 402 | 7.13% | 186 | 5 | CDP |
| Webberville | 13 | 489 | 403 | 3.6% | 234 | 2 | Village |
| Paige | 14 | 215 | 18 | 6.97% | 100 | 2 | CDP |
Bastrop is the largest city in Bastrop County, with a population of 13,452.
Paige is the smallest city in Bastrop County, with a population of 215.
There are 14 cities in Bastrop County, Texas.