| Walnut 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: | Steuben |
| Coordinates: | 40.4111°N -87.4156°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: | 47993 |
| Area Code: | 765 |
Walnut Grove was a small town (now extinct) in Prairie Township, Warren County, Indiana, located three miles east of Tab. A 1913 history describes the town's population as about 50.
A post office was once established at Walnut Grove in 1872, and remained in operation until it was discontinued in 1900.[1]
Walnut Grove is located in flat, open farmland at the intersection of County Roads 650 North and 500 West.