Monomoy usually refers to Monomoy Island off of the coast of Cape Cod, Massachusetts. It may also refer to:

Ships

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  • USS Monomoy (AG-40), a cargo ship of the US Navy commissioned in 1918 and eventual US Coast Guard Cutter
  • USCGC Monomoy (WAG-275), the former USS Monomoy
  • USCGC Monomoy (WPB 1326), a US Coast Guard Cutter commissioned in 1989