A by-election was held for the New South Wales Legislative Assembly seat of Ku-ring-gai on Saturday, 22 August 1992. It was triggered by the resignation on 24 June 1992 of Liberal Party Premier, Nick Greiner, after the scandal known as the 'Metherell affair'. The seat was subsequently won by Stephen O'Doherty of the Liberal Party. However the Liberals suffered a 14% drop in their primary vote, and a 17% drop in their two party preferred vote.