City of Onkaparinga: History
The council was formed on 1 July 1997 as the City of Happy Valley, Noarlunga and Willunga from the amalgamation of the former City of Happy Valley and City of Noarlunga with part of the District Council of Willunga. It adopted the City of Onkaparinga name from 22 December 1997.
1997–2006: Ray Gilbert
2006–2018: Lorraine Rosenberg
2018–2022: Erin Thompson
2022 (acting): Simon McMahon
2022–present: Moira Were