Union County's 2026 population is estimated at 604,983, reflecting a 0.52% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Union County is the 7th largest county in New Jersey. The 2010 population was 537,336 and has grown 12.59% since 2010.
Overall: 39.1 years
Female: 40.1 years
Male: 37.9 years
There are 443,030 adults, (87,277 of whom are seniors) in Union County.
Female: 293,097 (50.6%)
Male: 286,193 (49.4%)
The racial composition of Union County includes 39.36% White, 20.41% other race, 19.92% Black or African American, 5.63% Asian, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 228,008 | 39.36% |
| Other race | 118,213 | 20.41% |
| Black or African American | 115,397 | 19.92% |
| Two or more races | 81,706 | 14.1% |
| Asian | 32,637 | 5.63% |
| Native American | 3,233 | 0.56% |
| Native Hawaiian or Pacific Islander | 96 | 0.02% |
Union County 's average per capita income is $59,112. Household income levels show a median of $103,202. The poverty rate stands at 9.18%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $156,383 | $206,084 |
| Families | $125,330 | $171,270 |
| Households | $103,202 | $149,595 |
| Non Families | $59,397 | $80,952 |
Average Income
Median Household Income
Poverty Rate