Bridgeport is an unincorporated community in Bridgeport Charter Township, Saginaw County in the U.S. state of Michigan. It is also a census-designated place (CDP) for statistical purposes. The population was 7,849 at the 2000 census. Bridgeport is also the name of a post office with ZIP code 48722. The area served by the ZIP code includes the southeast portion of the CDP and includes southeastern portions of Bridgeport Charter Township outside of the CDP as well as portions of southwest Frankenmuth Township and a small area of northeastern Birch Run Township. The remainder of the CDP area is served by the Saginaw ZIP code 48601.
According to the United States Census Bureau, the CDP has a total area of 8.3 square miles (21.6 km²), all land.
Its area is start at the City of Saginaw Southeastern most border along the north border of the Township to I-75 to King Road east to Portsmouth Rd. Portsmouth south to Baker Road then south along Airport to Dixie Highway to I-75 south to Riverview Drive to north on Fort Road then flowing the river back to Dixie. West on Dixie to Washington Rd hence to Huron & Eastern Railway north to Williamson Rd and the Saginaw City border.