The 1951 Prahran state by-election was held on 16 June 1951 to elect the member for Prahran in the Victorian Legislative Assembly, following the resignation of Labor Party MP Frank Crean. Crean resigned to contest the federal election on 28 April 1951, where he was elected as the member for Melbourne Ports.
Robert Pettiona retained the seat for Labor despite a swing of 2.9% towards the Liberal and Country Party (LCP). He retained the seat at the 1952 state election but narrowly lost it to the LCP in 1955.
This was the final of three by-elections in Prahran held in a timeframe of six years, with by-elections also held in 1945 and 1949 (where Crean was elected).
Candidates are listed in the order they appeared on the ballot.
Robert Pettiona, the president of the Federated Rubber and Allied Workers' Union of Australia and the president of the Labor's Windsor branch, won the party's preselection. He had unsuccessfully ran for Labor preselection at the 1949 Prahran by-election. Pettiona three other candidates â H.E. Clarke (secretary of the Melbourne branch of the Waterside Workers' Federation), N. O'Donnell (public servant and Clerks' Union steward) and L.J. Stewart (Boot Trades Union organiser) â to win preselection.
The LCP chose Desmond McGinnes, a returned soldier, as its candidate. McGinnes had previously sought preselection at the 1949 Prahran by-election while serving as the president of the Prahran branch of the now-defunct Liberal Party. He also contested the 1949 federal election in the seat of Melbourne against Labor's Arthur Calwell.