The Putnam Bridge is a bridge in the state of Connecticut carrying the Route 3 freeway over the Connecticut River, connecting Interstate 91 in Wethersfield and Route 2 in Glastonbury.

It is the southernmost crossing of the Connecticut River in the Hartford Area and carries an average of 50,800 vehicles per day.

It originally terminated at Main Street in Glastonbury, rather than at Route 2.

It was expected to be expanded to a double-decker in the early 1970s as part of the planned Interstate 491, a southeastern bypass around Hartford from Wethersfield to East Hartford.

In 2013, the bridge underwent a $15 million rehabilitation project, which repaved the roadbed, repainted the girders, added new lighting fixtures and a new pedestrian walkway.