Flottsundsbron, bridge in Sweden

Flottsundsbron is a bascule bridge spanning the Fyrisån river in Uppsala that lifts to allow boat passage underneath. It features separate lanes for cars, bicycles, and pedestrians, connecting the southern parts of the city to the Flottsund area.

Different bridges have stood at this location since the 1600s, with old foundations still visible nearby. The current structure, a modern steel bridge completed in 2017, replaced an older wooden swing bridge that had deteriorated significantly.

The name Flottsundsbron comes from the Flottsund area at the mouth of the Fyrisån in Ekoln. Until 1960 the bridge carried the main road into Uppsala from Stockholm, then the E4 and Riksväg 13, now länsväg 255. Since 1 January 2003 a municipal boundary has again run across the bridge, separating Uppsala and Knivsta municipalities.

The bridge carries länsväg 255 over the Fyrisån at Flottsund, in Sunnersta at Uppsala's southern edge, near where the river meets Ekoln. It has separate lanes for cars, cyclists and pedestrians, so crossing on foot or by bike is straightforward. Old bridge piers from an earlier crossing stand just south of the present bridge.

The county boundary at the bridge moved south when the Knivsta area was incorporated into Uppsala Municipality in 1971, and since 1 January 2003 Knivsta has again been its own municipality, so a municipal boundary once more runs at the bridge. Old bridge piers from an earlier bridge stand just south of the present one.