Thorkild Simonsen (born 7 July 1926) is a Danish politician and member of the Social Democrats. He was mayor of Århus municipality from 1982 to 1997 and Interior Minister of Denmark from 1997 to 2000 in the Cabinets of Poul Nyrup Rasmussen III and IV. Simonsen was a member of Århus city council from 1966 to 1997 and mayor from 1 January 1982 to 1997, when he left the position to become Minister of Interior Affairs.