Half Moon Lake or Halfmoon Lake may refer to:
Lakes In Canada Half Moon Lake (Alberta), Canada Half Moon Lake, Alberta, a hamlet and resort on the lake Half Moon Lake (Ontario) in Parry Sound District, Ontario Halfmoon Lake (Nipissing District), Ontario Halfmoon Lake (Algoma District), Ontario Halfmoon Lake (Kenora District), Ontario Halfmoon Lake (Cochrane District), Ontario Halfmoon Lake (Rainy River District), Ontario
In the United States Half Moon Lake in Bossier Parish, Louisiana Half Moon Lake in Calhoun County, Arkansas Half Moon Lake in Desha County, Arkansas Half Moon Lake in Mississippi County, Arkansas Halfmoon Lake (Florida) Half Moon Lake (Berrien County, Michigan) Half Moon Lake (Meeker County, Minnesota) Halfmoon Lake (Barnstead, New Hampshire) Half Moon Lake (Polk County, Wisconsin) a water body near Milltown, Wisconsin, United States