David Wickham Ridgway is a South Australian politician who served as a member of the South Australian Legislative Council from 2002 to 2021, representing the Liberal Party of Australia (SA). Ridgway served as the Minister for Trade and Investment in the Marshall Ministry from 22 March 2018 to 26 July 2020, and as Minister for Tourism from March 2018 to January 2020.

The Legislative Council, or upper house, is one of the two chambers of the Parliament of South Australia. Its central purpose is to act as a house of review for legislation passed through the lower house, the House of Assembly. It sits in Parliament House in the state capital, Adelaide.