| Place Name | Greenfield |
| Place Type | City |
| GEOID | 5531175 |
| County | Milwaukee County |
| Area Code(s) | 414 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 37,623 |
| Population Growth Rate (2010-19) | 2.95% |
| Majority Ethnicity | White 76.21% |
| Metro/Micro Stats Area | Milwaukee-Waukesha, WI |
| US Congressional District(s) | Wisconsin 5th |
| State Assembly Districts | 7,82,84 |
| State Senate Districts | 3,28 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 76.21% |
| African American | 5.1% |
| Hispanic | 0.36% |
| Asian | 5.12% |
| Native American | 0.02% |
| Hawaiin/Pacific Islander | 13.2% |