The Marina Park Historic District encompasses the finest collection of high-style late 19th-century residential architecture in the city of Bridgeport, Connecticut.

The historic district is a small surviving area of a much larger development initiated by P.T.

Barnum, who engineered the acquisition of Seaside Park for the city, and built his own residences (neither standing anymore) in the area.

In the 1880s he subdivided his 30-acre (12 ha) estate known as Waldemere, selling off parcels for construction of a series of high-style residences.

Credit for designing Barnum's subdivision has been given to George W. Longstaff, a prominent local architect.