Union County's 2026 population is estimated at 28,539, reflecting a 0.31% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Union County is the 28th largest county in Mississippi. The 2010 population was 27,141 and has grown 5.15% since 2010.
Data after 2023 is projected based on recent change
Overall: 38.3 years
Female: 39.1 years
Male: 37.2 years
There are 21,083 adults, (4,662 of whom are seniors) in Union County.
Female: 14,381 (51.1%)
Male: 13,741 (48.9%)
The racial composition of Union County includes 76.62% White, 13.62% Black or African American, 3.15% other race, and smaller percentages for Native American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 21,547 | 76.62% |
| Black or African American | 3,831 | 13.62% |
| Two or more races | 1,615 | 5.74% |
| Other race | 887 | 3.15% |
| Native American | 162 | 0.58% |
| Asian | 80 | 0.28% |
Union County 's average per capita income is $40,281. Household income levels show a median of $55,505. The poverty rate stands at 15.14%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $83,580 | - |
| Families | $71,472 | $88,987 |
| Households | $55,505 | $75,967 |
| Non Families | $32,421 | $46,058 |
Average Income
Median Household Income
Poverty Rate