| Place Name | Union |
| Place Type | City |
| ZIP Code(s) | 41091 |
| County | Boone County |
| Area Code(s) | 859 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 5,357 |
| Population Growth Rate (2010-19) | 37.87% |
| Majority Ethnicity | White 94.26% |
| Metro/Micro Stats Area | Cincinnati, OH-KY-IN |
| US Congressional District(s) | Kentucky 4th |
| State House Districts | 60 |
| State Senate Districts | 11 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.26% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 2.53% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.21% |