The Green Monster is the left field wall at Fenway Park in Boston, Massachusetts.

Green Monster may also refer to:

;Boston Red Sox:

  • Wally the Green Monster, mascot
  • Green Monster (novel), featuring the Red Sox

;Infrastructure nicknames:

  • Hart Bridge in Jacksonville, Florida
  • Central Artery, an elevated section of I-93 freeway in downtown Boston, Massachusetts, before it was rebuilt underground as part of the Big Dig project

;Other:

  • Aerin Frankel, a goalie for the Boston Fleet nicknamed the "Green Monster"
  • Green Monster (automobile), series of dragsters and land speed record cars built by Art Arfons between 1952 and 1991.
  • Green Monster (EP), 2008 release by Suicide Silence
  • Green Monster Games, later 38 Studios, now defunct, video game developers
  • Green Monster of Braxton County, or Flatwoods monster, 1952 cryptid

See also

  • Green-Eyed Monster (disambiguation)