Gillespie County's 2026 population is estimated at 28,859, reflecting a 1.23% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Gillespie County is the 98th largest county in Texas. The 2010 population was 24,875 and has grown 16.02% since 2010.
Data after 2023 is projected based on recent change
Overall: 50.7 years
Female: 52.9 years
Male: 48.4 years
There are 22,174 adults, (8,301 of whom are seniors) in Gillespie County.
Female: 13,951 (50.7%)
Male: 13,573 (49.3%)
The racial composition of Gillespie County includes 81.91% White, 5.78% other race, and smaller percentages for Native American, Asian, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 22,545 | 81.91% |
| Two or more races | 3,017 | 10.96% |
| Other race | 1,591 | 5.78% |
| Native American | 124 | 0.45% |
| Asian | 116 | 0.42% |
| Black or African American | 86 | 0.31% |
| Native Hawaiian or Pacific Islander | 45 | 0.16% |
Gillespie County 's average per capita income is $46,557. Household income levels show a median of $76,162. The poverty rate stands at 9.23%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $117,610 | - |
| Families | $103,633 | $140,036 |
| Households | $76,162 | $116,131 |
| Non Families | $41,774 | $61,125 |
Average Income
Median Household Income
Poverty Rate