The Waalbrug is an arch bridge over the Waal River in Nijmegen, Gelderland, Netherlands. The full length of the Waalbrug is 604 metres, and in the middle of the arch it is about 65 metres high. The largest arch is 244.1 metres long and at the time of construction was the longest arch in Europe. Unlike many other bridges from the same period and with the same construction, like the IJsselbrug near Zwolle, the Graafsebrug and the bridge near Arnhem the Waalbrug is unique because it is an arch bridge in the literal sense and all the forces truly work on the two pylons.

The bridge was opened on the 16th of June, 1936 by Queen Wilhelmina of the Netherlands in front of 200.000 people. Until 1936 there was no permanent connection for ordinary traffic to the other side of the Waal. All traffic had to be moved by the "Zeldenrust" ferry. Train traffic had used a railway bridge since 1879. In 1906 the "Nijmegen Vooruit" (Nijmegen Ahead) committee started planning the building of the Waalbrug, but the First World War delayed the plans. In 1927 the definitive plans had been made and building of the bridge started October 23, 1931 after a plan of the architect G. Schoorl. At the start of the Second World War the Dutch combat engineering units blew up the bridge to stop the German army's advance. During the occupation the Germans restored the bridge and from 1943 it was in use for traffic again. In 1944 the Germans planned to blow up the bridge again, but the student Jan van Hoof managed to prevent this. On the 20th of September the bridge was conquered by allied forces. A plaque was added to the bridge as a reminder of van Hoof's actions. The bridge was coloured green until 1980, these days it is white.

Nowadays there is a bus lane on the west side of the Waalbrug. During the morning and evening rush hour there is often a large traffic jam on the bridge, just like the Keizer Karelplein the bridge is one of the problem traffic thoroughfares in Nijmegen. There are plans for another traffic bridge called the Stadsbrug. For cyclists there is the Snelbinder bridge, which is connected to the rail bridge. Because the Waalbrug is a crucial aspect in regional traffic it has been difficult to renovate the bridge. As soon as there is a new bridge, which will probably be built around 2011, it will be easier to divert the traffic and close down side lanes to renovate the bridge. In 2005 more than 50,000 vehicles used the bridge every 24 hours.

In popular culture
The Waalbrug can be found in the movie A Bridge Too Far and the computer game Medal of Honor: Frontline.