Madison Street Bridge, Historical bridge across Willamette River in Portland, United States.

Madison Street Bridge was a crossing spanning the Willamette River that connected Madison Street on the west bank to Hawthorne Avenue on the east bank. The structure featured a movable draw span to allow river traffic to pass beneath it.

The first structure was completed in 1891 by the Pacific Bridge Company and initially operated as a toll crossing until residents raised funds to purchase it. A disaster in 1893 resulted in seven deaths when a streetcar vehicle departed the open draw span, becoming one of Portland's worst transportation incidents.

The bridge's east end lay in East Portland until that city merged with Portland in July 1891, so the crossing linked two separate municipalities in its first months. Tolls ended on November 18, 1891, when a committee of eight Portland residents bought the bridge for $145,000. Streetcars of the Portland Railway, Light and Power Company ran across it.

The bridge no longer exists: it was closed on January 20, 1909, when debris piled against its piers in high water, and its structure and piers were demolished in August and September 1909. Its alignment was reused for the Hawthorne Bridge, which opened on December 19, 1910, so walkers and cyclists today cross there. The old crossing linked Madison Street on the west bank with Hawthorne Avenue on the east bank.

The structure was completely rebuilt in 1900 with enhanced structural improvements that reflected advances in engineering of the period. This reconstruction came after the tragic 1893 accident and demonstrated how such events prompted investments in newer safety methods.