| Official Name: | Mentor, Indiana |
| Pushpin Map: | Indiana#USA |
| Pushpin Label: | Mentor |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Dubois |
| Subdivision Type3: | Township |
| Subdivision Name3: | Jefferson |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 38.3164°N -86.7189°W |
| Elevation Ft: | 742 |
| Postal Code Type: | ZIP code |
| Postal Code: | 47513 |
| Area Code: | 812, 930 |
| Blank Name: | FIPS code |
| Blank Info: | 18-48420[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 451211 |
Mentor is an unincorporated community in Jefferson Township, Dubois County, in the U.S. state of Indiana.
Mentor was founded in 1881 by Francis M. Sanders. Sanders, an admirer of President James A. Garfield, named the settlement for Garfield's hometown of Mentor, Ohio.[2]
An old variant name of the community was called Altoga. A post office ran with this name from 1883 to 1908.[3]