Mission Bay may refer to:
Places Australia The former name of Minjilang, Northern Territory
New Zealand Mission Bay, New Zealand, a suburb of Auckland
United States Mission Bay (San Diego), a bay within Mission Bay Park Mission Bay, San Francisco, a neighborhood Mission Bay (San Francisco), a former bay that was filled in to create the Mission Bay neighborhood Mission Bay, Florida, a census-designated place located in Palm Beach County Mission Bay (Texas), a bay that feeds into Copano Bay
Military , a World War II aircraft carrier of the United States Navy Mission bay, a compartment which can be reconfigured to hold different mission-specific packages, as in the United States Navy's Littoral combat ship
Other Mission Bay, a release candidate for version 1.0 of the Mozilla Firefox web browser