Fifth Lake ist der Name folgender Seen in den Vereinigten Staaten:

• Fifth Lake (Alaska), Valdez-Cordova
• Fifth Lake (Kalifornien), Inyo County, Kalifornien
• Fifth Lake (Colorado), Grand County, Colorado
• Fifth Lake (Michigan), Montcalm County, Michigan
• Fifth Lake (Cass County, Minnesota), Minnesota
• Fifth Lake (Clearwater County, Minnesota), Minnesota
• Fifth Lake (Stearns County, Minnesota), Minnesota
• Fifth Lake (Essex County, New York), New York
• Fifth Lake (Hamilton County, New York), New York
• Fifth Lake (Ulster County, New York), New York
• Fifth Lake (Wisconsin), Oneida County, Wisconsin