3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fredericksburg | 1 | 11,889 | 11,021 | 1.49% | 1,244 | 9.56 | City |
| Harper | 2 | 1,219 | 1,391 | 0.08% | 22 | 56.57 | CDP |
| Stonewall | 3 | 572 | 607 | 0.7% | 38 | 15.03 | CDP |
Fredericksburg is the largest city in Gillespie County, with a population of 11,889.
Stonewall is the smallest city in Gillespie County.
There are 3 cities in Gillespie County, Texas.