Sussex County's 2026 population is estimated at 148,681, reflecting a 0.42% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Sussex County is the 17th largest county in New Jersey. The 2010 population was 148,859 and has grown -0.12% since 2010.
Overall: 43.8 years
Female: 45.1 years
Male: 42.8 years
There are 117,388 adults, (27,656 of whom are seniors) in Sussex County.
Female: 72,333 (49.6%)
Male: 73,474 (50.4%)
The racial composition of Sussex County includes 82.27% White, 4.18% other race, and smaller percentages for Asian, Black or African American, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 119,960 | 82.27% |
| Two or more races | 13,732 | 9.42% |
| Other race | 6,101 | 4.18% |
| Asian | 2,917 | 2% |
| Black or African American | 2,701 | 1.85% |
| Native American | 396 | 0.27% |
Sussex County 's average per capita income is $69,308. Household income levels show a median of $116,186. The poverty rate stands at 5.54%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $151,836 | $181,540 |
| Families | $137,107 | $165,340 |
| Households | $116,186 | $144,531 |
| Non Families | $71,538 | $91,364 |
Average Income
Median Household Income
Poverty Rate