Lost River may refer to:

Communities

Australia

  • Lost River, New South Wales

Canada

  • Lost River, Quebec, part of Harrington, Quebec
  • Rural Municipality of Lost River No. 313, Saskatchewan

United States

  • Lost River, Idaho
  • Lost River, Indiana
  • Lost River Township, Martin County, Indiana
  • Lost River, Kentucky
  • Lost River, West Virginia

Rivers

  • Losing stream, a river that decreases in volume as it flows

United States

  • In Alaska:
  • Lost River (Bering Sea)
  • Lost River (Nowitna River tributary), a tributary to the Nowitna River
  • Lost River (California), in California and Oregon
  • Big Lost River, Idaho
  • Little Lost River, Idaho
  • Lost River (Indiana)
  • In Minnesota:
  • Lost River (Clearwater River tributary)
  • Lost River (Nett Lake)
  • Lost River (Roseau River tributary)
  • Lost River (Tamarac River tributary)
  • Lost River (Thief River tributary)
  • Lost River (New Hampshire)
  • Lost River (Methow River tributary), a tributary to the Methow River
  • Lost River (Cacapon River tributary), in West Virginia

Other uses

  • Lost River (film), a 2014 American film directed by Ryan Gosling
  • The Lost River, 2014 book by Michel Danino subtitled On The Trail of the Sarasvati
  • Lost River Cave, Kentucky
  • Lost River Caverns, Pennsylvania
  • Lost River State Forest, Minnesota
  • Lost River Athletic Conference, a 1970s high school conference in Indiana
  • Lost River Jr./Sr. High School, serving Merrill, Oregon