| Official Name: | Union Grove, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Whiteside |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 689 |
| Coordinates: | 41.8342°N -90.0264°W |
| Area Code: | 815 & 779 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 420071 |
Union Grove is an unincorporated community in Whiteside County, in the U.S. state of Illinois.
A post office called Union Grove was in operation from 1840 until 1926.[1] Union Grove was named from two nearby, nearly identical groves.[2]