Green Key is managed internationally by the Foundation for Environmental Education (FEE), a private company limited by guarantee and registered in England & Wales with company number 04752279 and registered office at 74 The Close, Norwich, Norfolk NR1 4DR. Registered charity number 1148274.

In England, Green Key is operated by environmental charity Keep Britain Tidy, registered Charity No. 1071737. Registered as a Company limited by guarantee in England & Wales No. 3496361. Registered office at Elizabeth House, The Pier, Wigan, WN3 4EX.