| Official Name: | Jeff, Indiana |
| Mapsize: | 150px |
| Pushpin Map: | USA Indiana Wells County |
| Pushpin Label: | Jeff |
| Pushpin Map Caption: | Location of Jeff in Wells County |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Wells |
| Subdivision Type3: | Township |
| Subdivision Name3: | Jackson |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.6053°N -85.3531°W |
| Elevation Ft: | 846 |
| Postal Code Type: | ZIP code |
| Postal Code: | 46792 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 436954 |
Jeff is an unincorporated community in Jackson Township, Wells County, in the U.S. state of Indiana.
Jeff is believed to be named after Jeff Jones, the son of a local landowner.[1]
A post office was established at Jeff in 1891, and remained in operation until it was discontinued in 1903.[2]