| Name | New Haven County |
| State | Connecticut |
| FIPS Code | 09009 |
| County Seat | New Haven |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 860,995 |
| Population Growth Rate(2020-2022) | 0.27% |
| Majority Ethnicity | White 79.19% |
| Public School Majority Ethnicity | White 40% |
| Partisan Voting Index | Democratic:+10 |
| Unemployment Rate (May 2026) | 7.0% |
| Sales Tax Rate (2025) | 6.35% |
| Area Code(s) | 203 / 475 / 860 / 959 |
| Race/Ethnicity | Percentage of Population (2021) |
|---|---|
| White | 79.19% |
| African American | 15.84% |
| Hispanic | 0.2% |
| Asian | 4.68% |
| Native American | 0.04% |
| Hawaiin/Pacific Islander | 0.04% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 39.7% |
| African American | 16.86% |
| Hispanic | 35% |
| Asian | 4.14% |
| Native American | 0.22% |
| Hawaiin/Pacific Islander | 0.05% |