| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fredericksburg | 1 | 12,064 | 11,026 | 1.44% | 1,262 | 10 | City |
Fredericksburg is the largest city in Gillespie County, with a population of 12,064.
Fredericksburg is the smallest city in Gillespie County, with a population of 12,064.
There is 1 city in Gillespie County, Texas.