Union County's 2026 population is estimated at 26,532, reflecting a -0.27% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Union County is the 35th largest county in South Carolina. The 2010 population was 28,914 and has grown -8.24% since 2010.
Data after 2023 is projected based on recent change
Overall: 44.5 years
Female: 45.8 years
Male: 42.7 years
There are 21,295 adults, (5,810 of whom are seniors) in Union County.
Female: 14,201 (52.8%)
Male: 12,684 (47.2%)
The racial composition of Union County includes 64.52% White, 27.8% Black or African American, and smaller percentages for other race, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 17,346 | 64.52% |
| Black or African American | 7,475 | 27.8% |
| Two or more races | 1,610 | 5.99% |
| Other race | 325 | 1.21% |
| Native American | 81 | 0.3% |
| Asian | 43 | 0.16% |
| Native Hawaiian or Pacific Islander | 5 | 0.02% |
Union County 's average per capita income is $37,336. Household income levels show a median of $41,621. The poverty rate stands at 22.62%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $76,356 | $88,168 |
| Families | $59,824 | $73,248 |
| Households | $41,621 | $60,230 |
| Non Families | $23,866 | $36,334 |
Average Income
Median Household Income
Poverty Rate