Grass Lake
- Grass Lake (Codington County, South Dakota)
- Grass Lake (Haliburton County)
- Grass Lake (Kanabec County, Minnesota)
- Grass Lake (Minnehaha County, South Dakota)
- Grass Lake (New York)
- Grass Lake Charter Township, Michigan
- Grass Lake Community Schools
- Grass Lake High School
- Grass Lake Nature Park
- Grass Lake School District 36
- Grass Lake Township (disambiguation)
- Grass Lake Township, Kanabec County, Minnesota
- Grass Lake, Illinois
- Grass Lake, Michigan
- Grass Lake, Minnesota
- Grassy Creek (disambiguation)
- Grassy Lake (disambiguation)
- Rural Municipality of Grass Lake No. 381