Strängnäs Bridge, Transportation bridge across Lake Mälaren in Strängnäs Municipality, Sweden.

Strängnäs Bridge crosses Lake Mälaren and connects different parts of the municipality. The structure spans several hundred meters across the water and forms the main link between the separated areas.

Strängnäs Bridge opened on 29 October 1981, replacing the Tosterö Bridge of 1936 that had linked central Strängnäs with Abborrberget. The Swedish Road Administration commissioned it and Skånska Cementgjuteriet built it in about three years. The bridge cost 40 million kronor; with the road 55 bypass the total reached 70 million, 10 million over the estimate.

The bridge carries Riksväg 55 over Strängnäsfjärden, linking the Södermanland regiment area to Stenby skans on Tosterön. It replaced the 1936 Tosterö bridge, which ran from central Strängnäs to Abborrberget. Near the northern end there is a rest area where drivers on the route can stop.

The bridge carries Riksväg 55 over the Strängnäsfjärden with a clear height of 26 metres for boats passing beneath. At its northern end there is a rest area where drivers can stop. The navigation channel below is 50 metres wide.

The bridge's two supports beside the navigation channel are built to withstand a collision of 1,000 tonnes. Its clear height over the water is 26 metres, and the channel beneath is 50 metres wide. A rest area sits at the northern end of the span.