The Keokuk Bridge, also known as the Keokuk Municipal Bridge, is a double-deck, single-track railway and highway bridge across the Mississippi River in the United States between Keokuk, Iowa, and Hamilton, Illinois, just downstream of Mississippi Lock and Dam number 19.

Following the completion of the Keokuk-Hamilton Bridge in 1985, the US Route 136 traffic was rerouted there, and the upper deck of this bridge, on the Keokuk side, was converted to an observation deck to view the nearby lock and dam; this deck is no longer used for road traffic, but the lower deck is still used for rail traffic.

Today, it serves the Keokuk Junction Railway with occasional train crossings for interconnection and river terminal services.

On the Illinois side of the bridge, two precast concrete barriers prevent auto traffic from driving on to the old highway section.

The bridge was documented as survey number IA-3 by the Historic American Engineering Record, archived in the Library of Congress.