| Official Name: | Lost Lake, Wisconsin |
| Pushpin Map: | Wisconsin#USA |
| Pushpin Label: | Lost Lake |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Dodge County |
| Subdivision Type3: | Towns |
| Subdivision Name3: | Calamus, Westford |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 928 |
| Coordinates: | 43.4589°N -88.9889°W |
| Area Code: | 920 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1577709 |
Lost Lake is an unincorporated community in the towns of Calamus and Westford, Dodge County, Wisconsin, United States.