Bitter Lake may refer to:

• Bitter Lake (Ontario), Canada
• Great Bitter Lake, Egypt
  • Battle of Bitter Lakes, a 925 BCE conflict

• Bitter Lake (Day County, South Dakota)
• Bitter Lake (Miner County, South Dakota)
• Bitter Lake (Seattle), a lake in Washington
  • Bitter Lake, Seattle, a neighborhood surrounding the lake

• Bitter Lake (film), a 2015 BBC documentary film by Adam Curtis
• Bitter Lake National Wildlife Refuge, a refuge in New Mexico

Places with names meaning "bitter lake" in other languages:

• Lake Acıgöl, a lake in Turkey
• Lake Magadi, a lake in Kenya
• Lake Pikrolimni, a lake in Greece
• Ashchykol (disambiguation), Kazakhstan
• Gorkoye, lakes in Russia