| Place Name | Northfield |
| Place Type | City |
| ZIP Code(s) | 40207 40222 |
| County | Jefferson County |
| Area Code(s) | 502 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 953 |
| Population Growth Rate (2010-19) | -2.84% |
| Majority Ethnicity | White 90.99% |
| Metro/Micro Stats Area | Louisville/Jefferson County, KY-IN |
| US Congressional District(s) | Kentucky 3rd |
| State House Districts | 32 |
| State Senate Districts | 26 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 90.99% |
| African American | 3.34% |
| Hispanic | 0% |
| Asian | 3.6% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.06% |