| Locust Grove | |
| Settlement Type: | Ghost town |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Warren |
| Subdivision Type3: | Township |
| Subdivision Name3: | Prairie |
| Coordinates: | 40.4406°N -87.4347°W |
| Pushpin Map: | USA Indiana Warren County |
| Pushpin Map Caption: | Location in Warren County |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Postal Code Type: | ZIP code |
| Postal Code: | 47917 |
| Area Code: | 765 |
Locust Grove was a small town (now extinct) in Prairie Township, Warren County, in the U.S. state of Indiana, located three miles northeast of Tab. A 1913 history describes the town's population as "less than a hundred", but all that remains at the site is the Locust Grove Church, Locust Grove Cemetery and a few homes.
Locust Grove is located at the intersection of County Roads 850 N and 600 W. It sits in open farmland on a low, broad hill.