National road 5 (Polish: Droga krajowa nr 5) is a route belonging to the Polish national road network. The highway connects some of the biggest urban agglomerations in Poland, i.e. Trójmiasto, Bydgoszcz, Poznań and Wrocław. It runs from Nowe Marzy to Lubawka at the Czech border and between Bielany Wrocławskie and Kostomłoty merges with A4 motorway. On the segment from Nowe Marzy to Wrocław, it is a component of European route E261.