Bridgeport Harbor is an inlet on the north side of Long Island Sound in Bridgeport, Connecticut. It was carved by the retreat of the glaciers during the last ice age approximately 13,000 years ago. Bridgeport Harbor is a federal shipping port and a terminus of the Bridgeport & Port Jefferson Steamboat Company, one of the oldest ferry companies in the nation. It is due east of the smaller Black Rock Harbor which is also in the city of Bridgeport.