| Name | Middlesex County |
| State | New Jersey |
| FIPS Code | 34023 |
| County Seat | New Brunswick |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 876,119 |
| Population Growth Rate(2020-2024) | 1.47% |
| Majority Ethnicity | White 42.66% |
| Public School Majority Ethnicity | Hispanic 34% |
| Partisan Voting Index | Democratic:+7 |
| Unemployment Rate (May 2026) | 5.1% |
| Sales Tax Rate (2025) | 6.63% |
| Area Code(s) | 732 / 848 / 609 / 640 / / 908 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 42.66% |
| African American | 10.04% |
| Hispanic | 22.19% |
| Asian | 24.18% |
| Native American | 0.89% |
| Hawaiin/Pacific Islander | 0.03% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 23.33% |
| African American | 9.69% |
| Hispanic | 34.13% |
| Asian | 29.74% |
| Native American | 0.42% |
| Hawaiin/Pacific Islander | 0.21% |