Bybee Bridge, Road bridge in southeast Portland, United States.

The Bybee Bridge is a road bridge over McLoughlin Boulevard (Oregon Route 99E) in southeast Portland, Oregon, linking the Eastmoreland and Sellwood neighborhoods. It was assembled from three separate structures built between 1911 and 1943, and its 2004 rebuilding added elevators and bus pullouts where the MAX Orange Line's Southeast Bybee Boulevard station sits beneath the overpass, entered through a cupola on the bridge.

The original bridge was built in three separate stages between 1911 and 1943, developing gradually over more than three decades. In 2004, it underwent major reconstruction to meet modern transportation needs and improve its overall condition.

The bridge is named after James Francis Bybee. Its first span, built in 1911 by the Ladd Estate Company, carried the Portland Railway, Light and Power "Eastmoreland" streetcar line from Sellwood over the crossing to 32nd and Rex in Eastmoreland. That line became Portland's first trolley bus service in 1936.

The bridge carries traffic over McLoughlin Boulevard (Oregon Route 99E) between Eastmoreland and Sellwood. The MAX Orange Line's Southeast Bybee Boulevard station sits on an island platform beneath the overpass, reached by elevators and a cupola entrance on the bridge; bus pullouts serve buses. The 2004 rebuild added the sidewalks and bike lanes that had been missing.

The Bybee Bridge Bioswale, on the bridge's northwest side, was finished in November 2004, the same month the rebuilt bridge reopened. It is mostly mowed grass that drains water from the bridge toward Crystal Springs. A September 2011 survey found little invasive growth but recorded blackberry, morning glory and other weeds, alongside native alder, ash, cattail, cottonwood, Douglas-fir, rushes and sedges.