| Official Name: | Linn Grove, Indiana |
| Settlement Type: | Unincorporated community and Census-designated place |
| Mapsize: | 120px |
| Pushpin Map: | USA Indiana Adams County |
| Pushpin Label: | Linn Grove |
| Pushpin Map Caption: | Location in Adams County |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Adams |
| Subdivision Type3: | Township |
| Subdivision Name3: | Hartford |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.6447°N -85.035°W |
| Elevation Ft: | 833 |
| Postal Code Type: | ZIP code |
| Postal Code: | 46711 |
| Blank Name: | FIPS code |
| Blank Info: | 18-44154[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2830297 |
Linn Grove is an unincorporated community in Hartford Township, Adams County, in the U.S. state of Indiana.
The first post office at Linn Grove was established as "Linn" in 1848.[2] It is still currently in operation.[3] [4]