3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fredericksburg | 1 | 11,949 | 11,032 | 1.56% | 1,250 | 10 | City |
| Harper | 2 | 1,219 | 1,391 | 0.08% | 22 | 57 | CDP |
| Stonewall | 3 | 572 | 607 | 0.7% | 38 | 15 | CDP |
Fredericksburg is the largest city in Gillespie County, with a population of 11,949.
Stonewall is the smallest city in Gillespie County, with a population of 572.
There are 3 cities in Gillespie County, Texas.