The Barnum Museum is a museum at 820 Main Street in Bridgeport, Connecticut, United States. It has an extensive collection related to P. T. Barnum and the history of Bridgeport. The building in which it is housed was built with funding from Barnum, and initially housed the Barnum Institute of Science and History. The building is on the National Register of Historic Places, and was designated a National Historic Landmark for its association with Barnum.