The Willemsbrug is a bridge next to the Erasmusbrug in the centre of Rotterdam, spanning the Nieuwe Maas. It links the northern part of the city with the Noordereiland and (in combination with the Koninginnebrug) the district of Feijenoord.

The bridge was completed in 1981, designed by C. Veerling and named after King Willem III of the Netherlands. It replaced an older bridge which had been opened in 1879 but was severely outdated.