Sussex County's 2026 population is estimated at 285,452, reflecting a 2.57% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Sussex County is the 2nd largest county in Delaware. The 2010 population was 197,883 and has grown 44.25% since 2010.
Data after 2023 is projected based on recent change
Overall: 51.9 years
Female: 53.6 years
Male: 50.1 years
There are 209,370 adults, (77,249 of whom are seniors) in Sussex County.
Female: 131,608 (51.5%)
Male: 124,018 (48.5%)
The racial composition of Sussex County includes 74.15% White, 9.94% Black or African American, 4.92% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 189,534 | 74.15% |
| Black or African American | 25,415 | 9.94% |
| Two or more races | 23,058 | 9.02% |
| Other race | 12,569 | 4.92% |
| Asian | 3,244 | 1.27% |
| Native American | 1,765 | 0.69% |
| Native Hawaiian or Pacific Islander | 41 | 0.02% |
Sussex County 's average per capita income is $46,674. Household income levels show a median of $81,497. The poverty rate stands at 10.87%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $110,457 | $141,195 |
| Families | $97,693 | $127,885 |
| Households | $81,497 | $109,282 |
| Non Families | $47,920 | $64,493 |
Average Income
Median Household Income
Poverty Rate