Quinnipiac River Historic District is a 313-acre (127 ha) historic district straddling the Quinnipiac River in the Fair Haven and Fair Haven Heights neighborhoods of New Haven, Connecticut. It encompasses most of the historic maritime village of Fair Haven, with a history dating back to the 18th century. It was listed on the National Register of Historic Places in 1984. At that time it included 524 contributing buildings, an inland wetland at the mouth of Hemingway Creek on the northeast corner of the district, and the Grand Avenue Swing Bridge over the Quinnipiac River connecting Fair Haven with Fair Haven Heights at the center of the district.