John McLoughlin Bridge, Tied-arch bridge in Oregon City, United States.

The John McLoughlin Bridge is a tied-arch bridge over the Clackamas River between Oregon City and Gladstone, Oregon. It has a total length of 720 feet (220 m) and a main span of 240 feet (73 m). The deck carries four lanes of Oregon Route 99E, also known as McLoughlin Boulevard.

Completed in 1933, the bridge was designed by Conde McCullough and named for Dr. John McLoughlin. That same year it won the American Institute of Steel Construction's title of "Most Beautiful Steel Bridge" for structures built in 1933. It was originally painted black before receiving "ODOT Green" soon after.

The structure carries Oregon Route 99E across the river and displays concrete railings with pylons at each end, reflecting the design principles of regional highway development from that era.

The bridge is open daily for vehicle traffic and offers easy access from either side of the river. Visitors can view it from the road or from nearby riverbank areas for the best perspective.

The bridge won the American Institute of Steel Construction's title of "Most Beautiful Steel Bridge" for 1933, not a merit award. It was first painted black, then repainted "ODOT Green" soon after, the first use of that specific color on a bridge.