| Name | Union County |
| State | New Jersey |
| FIPS Code | 34039 |
| County Seat | Elizabeth |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 582,080 |
| Population Growth Rate(2020-2024) | 1.15% |
| Majority Ethnicity | White 40.66% |
| Public School Majority Ethnicity | Hispanic 47% |
| Partisan Voting Index | Democratic:+14 |
| Unemployment Rate (May 2026) | 5.5% |
| Sales Tax Rate (2025) | 6.63% |
| Area Code(s) | 908 / 732 / 848 / 862 / 973 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 40.66% |
| African American | 20% |
| Hispanic | 33.52% |
| Asian | 5.47% |
| Native American | 0.32% |
| Hawaiin/Pacific Islander | 0.02% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 27.54% |
| African American | 17.97% |
| Hispanic | 46.71% |
| Asian | 5.29% |
| Native American | 0.12% |
| Hawaiin/Pacific Islander | 0.18% |