Joachim Erwin (2 September 1949 – 20 May 2008) was a German politician and the Mayor of Düsseldorf from 1999 until his death in 2008. He was born in Stadtroda, Thuringia, Germany. Erwin was a member of the Christian Democratic Union (CDU). Erwin was married with Hille Erwin and had two children. Joachim Erwin died on 20 May 2008 of colorectal cancer in Düsseldorf at the age of 58.