Erkrath is known since 1148 and received the city rights in 1966. In 1975, the municipality of Hochdahl was incorporated into Erkrath. As well its former borough Unterbach was incorporated into Düsseldorf. Only a part of Unterbach called Unterfeldhaus remained as now a borough of its own with Erkrath. Erkrath today has three local parts: Erkrath, Hochdahl and Unterfeldhaus.