The 1990 Fremantle state by-election was a by-election held on 26 May 1990 for the Western Australian Legislative Assembly seat of Fremantle. The election occurred on the same day as the 1990 Maylands state by-election. The by-election was triggered by the resignation of Labor member and former Deputy Premier David Parker on 26 April 1990. The seat of Fremantle, first established in 1890, was considered to be a safe seat for the Labor Party.