may refer to:

In geography:

* Green Bay, Wisconsin, United States * Green Bay (Lake Michigan), a bay of Wisconsin known to locals as the Bay of Green Bay * Green Bay (town), Wisconsin, United States * Green Bay, New Zealand * Green Bay, Newfoundland and Labrador, a bay located on the island of Newfoundland * Green Bay, Nova Scotia, Canada * Green Bay, small community of Northeastern Manitoulin and the Islands, Ontario, Canada * Green Bay, Virginia

In sports: * Green Bay Blizzard, a professional arena football team * Green Bay Bombers, an indoor football team * Green Bay Bullfrogs, a baseball team * Green Bay Gamblers, a Tier 1 junior ice hockey team * Green Bay Gladiators, a semi-pro football team * Green Bay Packers, a professional American football team * Green Bay Phoenix (UW-Green Bay Phoenix), the athletic program of the University of Wisconsin-Green Bay