Dorchester County's 2026 population is estimated at 184,449, reflecting a 2.73% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Dorchester County is the 11th largest county in South Carolina. The 2010 population was 137,005 and has grown 34.63% since 2010.
Data after 2023 is projected based on recent change
Overall: 38 years
Female: 38.8 years
Male: 37.1 years
There are 126,948 adults, (25,407 of whom are seniors) in Dorchester County.
Female: 85,603 (51.2%)
Male: 81,598 (48.8%)
The racial composition of Dorchester County includes 61.93% White, 25.22% Black or African American, 3.07% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 103,549 | 61.93% |
| Black or African American | 42,160 | 25.22% |
| Two or more races | 12,298 | 7.36% |
| Other race | 5,135 | 3.07% |
| Asian | 3,531 | 2.11% |
| Native American | 429 | 0.26% |
| Native Hawaiian or Pacific Islander | 99 | 0.06% |
Dorchester County 's average per capita income is $50,722. Household income levels show a median of $78,198. The poverty rate stands at 11.38%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $113,358 | $132,535 |
| Families | $92,757 | $113,660 |
| Households | $78,198 | $100,220 |
| Non Families | $49,906 | $63,532 |
Average Income
Median Household Income
Poverty Rate