Office Bridge, Covered bridge in Oregon, United States.

Office Bridge is a covered wooden structure in Oregon that spans a waterway with protective side walls and a peaked roof overhead. Its interior reveals traditional truss framing that supports both the roadway and the roof structure.

Built in 1944 by the Westfir Lumber Company, Office Bridge replaced a 1941 span that washed away and carried logging trucks to the company mill and mill pond. The company town, mill and bridge were sold to an investment firm in 1977; the mill burned down in the early 1980s. Lane County acquired the bridge in 1992 through property tax foreclosure, stabilized it in 1993 and replaced the roof in 2002.

The bridge takes its name from the Westfir Lumber Company offices once standing across the river, now a bed and breakfast that keeps the company's walk-in safe. Each Christmas season the town strings lights on the bridge, switched on the first week after Thanksgiving by Santa Claus arriving in a firetruck.

This covered bridge sits in a rural area of Oregon and can be reached by local road access. Daylight visits work best since the interior can be dim, making it easier to see the structural details overhead.

Office Bridge is the only covered bridge west of the Mississippi River with a separate pedestrian walkway alongside the roadway. It is also one of just two covered bridges in Oregon built with a triple Howe truss.