Green Key may refer to: Green Key International, an eco-label based in Denmark Green Key Global, an industry-led eco-label based in Canada Green Key Books, a company who acquired the publishing rights to God's Word Translation Green Key Society, a student group at Dartmouth College, Hanover, New Hampshire, US Green Key Weekend, a Dartmouth College tradition Green Key Technologies, a major telephony key system used in financial trading turrets
See also Green Cay National Wildlife Refuge, near Saint Croix, U.S. Virgin Islands