| Official Name: | Tocsin, Indiana |
| Settlement Type: | Unincorporated community and Census-designated place |
| Mapsize: | 150px |
| Pushpin Map: | USA Indiana Wells County |
| Pushpin Label: | Tocsin |
| Pushpin Map Caption: | Location of Tocsin 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: | Lancaster |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.8308°N -85.1081°W |
| Elevation Ft: | 833 |
| Postal Code Type: | ZIP code |
| Postal Code: | 46777 |
| Area Code: | 260 |
| Blank Name: | FIPS code |
| Blank Info: | 18-76076[1] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2830583 |
Tocsin is an unincorporated community in Lancaster Township, Wells County, in the U.S. state of Indiana. It is on the border with Jefferson Township.
Tocsin was platted in 1884.[2] A post office was established at Tocsin in 1882, and remained in operation until it was discontinued in 1966.[3]