Diamond Lake
- Cass County, Michigan
- Diamond Lake (Greyhawk)
- Diamond Lake (Idaho)
- Diamond Lake (Illinois)
- Diamond Lake (Kandiyohi County, Minnesota)
- Diamond Lake (Ontario)
- Diamond Lake (Oregon)
- Diamond Lake (South Dakota)
- Diamond Lake Township, Dickinson County, Iowa
- Diamond Lake Township, Minnesota
- Diamond Lake, Minneapolis
- Diamond Lake, Washington
- Diamond Valley Lake
- List of lakes named Diamond
- List of lakes of New Zealand
- Mundelein, Illinois