This is a list of candidates of the 1921 South Australian state election.
There had also been two resignations in the months leading up to the election which had remained unfilled. Murray Liberal MHA Angas Parsons resigned on 5 January 1921 due to his appointment to the judiciary. Sturt Liberal MHA Edward Vardon resigned on 15 February 1921 in order to nominate, successfully, for a vacancy in the Australian Senate.
Sitting members are shown in bold text. Successful candidates are marked with an asterisk.