McMullen County's 2026 population is estimated at 537, reflecting a -2.54% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). McMullen County is the 250th largest county in Texas. The 2010 population was 711 and has grown -24.47% since 2010.
Data after 2023 is projected based on recent change
Overall: 31.8 years
Female: 19.2 years
Male: 37.4 years
There are 421 adults, (121 of whom are seniors) in McMullen County.
Female: 424 (60.6%)
Male: 276 (39.4%)
The racial composition of McMullen County includes 43.71% White, 7.14% other race, and smaller percentages for Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Two or more races | 341 | 48.71% |
| White | 306 | 43.71% |
| Other race | 50 | 7.14% |
| Native American | 3 | 0.43% |
McMullen County 's average per capita income is $36,283. Household income levels show a median of $43,875. The poverty rate stands at 12.29%.
| Name | Median ↓ | Mean |
|---|---|---|
| Families | $45,250 | $75,899 |
| Households | $43,875 | $69,640 |
| Non Families | $32,083 | $33,441 |
| Married Families | - | - |
Average Income
Median Household Income
Poverty Rate
