Somerset County's 2026 population is estimated at 368,211, reflecting a 1.48% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Somerset County is the 13th largest county in New Jersey. The 2010 population was 324,120 and has grown 13.6% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.8 years
Female: 42.9 years
Male: 41 years
There are 275,802 adults, (59,537 of whom are seniors) in Somerset County.
Female: 177,430 (50.7%)
Male: 172,416 (49.3%)
The racial composition of Somerset County includes 51.6% White, 19.65% Asian, 9.54% Black or African American, 8.36% other race, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 180,538 | 51.6% |
| Asian | 68,731 | 19.65% |
| Two or more races | 36,420 | 10.41% |
| Black or African American | 33,390 | 9.54% |
| Other race | 29,259 | 8.36% |
| Native American | 1,478 | 0.42% |
| Native Hawaiian or Pacific Islander | 30 | 0.01% |
Somerset County 's average per capita income is $78,435. Household income levels show a median of $140,374. The poverty rate stands at 5.37%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $196,219 | $247,581 |
| Families | $171,215 | $222,702 |
| Households | $140,374 | $191,543 |
| Non Families | $78,739 | $107,231 |
Average Income
Median Household Income
Poverty Rate