Martin County's 2026 population is estimated at 5,137, reflecting a -0.41% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Martin County is the 197th largest county in Texas. The 2010 population was 4,809 and has grown 6.82% since 2010.
Data after 2023 is projected based on recent change
Overall: 37.3 years
Female: 41.3 years
Male: 36.1 years
There are 3,660 adults, (570 of whom are seniors) in Martin County.
Female: 2,176 (41.7%)
Male: 3,042 (58.3%)
The racial composition of Martin County includes 67.17% White, 9.39% other race, and smaller percentages for Black or African American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 3,505 | 67.17% |
| Two or more races | 1,072 | 20.54% |
| Other race | 490 | 9.39% |
| Black or African American | 146 | 2.8% |
| Asian | 5 | 0.1% |
Martin County 's average per capita income is $59,848. Household income levels show a median of $93,734. The poverty rate stands at 8.32%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $105,792 | - |
| Families | $105,720 | $136,055 |
| Households | $93,734 | $122,087 |
| Non Families | - | $48,468 |
Average Income
Median Household Income
Poverty Rate
