Green Bay är en stad i Brown County delstaten Wisconsin i USA. 2010 uppgick invånarantalet till 104 057. Green Bay är administrativ huvudort i Brown County.
G B is the principal city of the G B Metropolitan Statistical Area, which covers Brown, Kewaunee, and Oconto counties; the MSA had a combined population of 306,241 at the 2010 census.
G B is an industrial city with several meatpacking and paper plants, and a port on G B , an arm of Lake Michigan that locals call the Bay of Green Bay, to avoid conflating it with the eponymous city. It is home to the National Railroad Museum; the Neville Public Museum, with exhibitions of art, history, and science; the Children’s Museum; and the University of Wisconsin–Green Bay.