^Swing is calculated using the Butler method, being the average of the winning party percentage-point gain and the losing party percentage-point loss. NA is used where one of the parties did not contest both elections.
^The member for Sturt Percy Brookfield was murdered while trying to disarm a deranged man at Riverton on 22 March 1921. Which party interest Brookfield represented was not straightforward. He had been elected under the banner of the Socialist Labor Party at the 1920 election for Sturt, however he formed a new Industrial Labor Party in February 1921, shortly before his death.[4] There was debate concerning who should be appointed. The Industrial Labor Party said that John O'Reilly should be appointed, while The Sydney Morning Herald stated that Thomas Hynes had the greater number of primary votes at the 1920 election and thus he should be appointed.[5] The nomination had to come from the recognised party leader according to votes on any censure motion and Labor leader and Premier John Storey nominated Jabez Wright who took his seat on 30 August 1921.[6]
^The returning officer declared that William Ashford had been re-elected. The result was overturned by the Elections and Qualifications Committee who declared that Joseph Clark had been elected instead.[7]