Fairfield County's 2026 population is estimated at 20,323, reflecting a -0.11% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Fairfield County is the 39th largest county in South Carolina. The 2010 population was 23,860 and has grown -14.82% since 2010.
Data after 2023 is projected based on recent change
Overall: 47.4 years
Female: 49.3 years
Male: 45.8 years
There are 16,859 adults, (4,941 of whom are seniors) in Fairfield County.
Female: 10,537 (51.3%)
Male: 10,013 (48.7%)
The racial composition of Fairfield County includes 55.02% Black or African American, 39.09% White, and smaller percentages for other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Black or African American | 11,307 | 55.02% |
| White | 8,034 | 39.09% |
| Two or more races | 969 | 4.72% |
| Other race | 203 | 0.99% |
| Asian | 21 | 0.1% |
| Native American | 16 | 0.08% |
Fairfield County 's average per capita income is $39,988. Household income levels show a median of $47,885. The poverty rate stands at 15.65%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $88,329 | - |
| Families | $64,138 | $89,409 |
| Households | $47,885 | $72,061 |
| Non Families | $26,757 | $37,168 |
Average Income
Median Household Income
Poverty Rate