The Haddam Swing Bridge is a historic bridge located in Haddam, Connecticut. It spans the Connecticut River, connecting the towns of Haddam and East Haddam. Built in 1913, the bridge is a swing-type design, allowing it to rotate horizontally to let boats pass through. The bridge is notable for its engineering and architectural significance, featuring a steel structure that supports vehicle and pedestrian traffic. It was added to the National Register of Historic Places in 1993, highlighting its importance in the region's transportation history and its role in connecting communities along the river.