| Country: | New South Wales |
| Type: | parliamentary |
| Ongoing: | no |
| Election Date: | 28 July 1951 |
| Vote Type: | Popular |
| Image1: | Anthony Luchetti.jpg |
| Candidate1: | Tony Luchetti |
| Party1: | Australian Labor Party |
| Popular Vote1: | 18,426 |
| Percentage1: | 52.3% |
| Swing1: | 9.5pp |
| Candidate2: | William Hannam |
| Party2: | Liberal Party of Australia |
| Popular Vote2: | 12,356 |
| Percentage2: | 35.1% |
| Swing2: | 3.1pp |
| MP | |
| Before Election: | Ben Chifley |
| Before Party: | Australian Labor Party |
| After Election: | Tony Luchetti |
| After Party: | Australian Labor Party |
| Election Name: | 1951 Macquarie by-election |
| Candidate3: | William Blanchard |
| Party3: | Independent Labor |
| Popular Vote3: | 3,853 |
| Percentage3: | 10.9% |
| Swing3: | 10.9pp |
The 1951 by-election for the Australian House of Representatives seat of Macquarie was held on 28 July after the death of the incumbent Australian Labor Party member, former Prime Minister Ben Chifley, who died on 14 June after suffering a heart attack. Chifley's death came less than three months after the 1951 general election.
Contesting the seat for the Labor Party was Tony Luchetti, who had been the Lang Labor candidate in Macquarie in 1931 and 1934, his preferences defeating Chifley in 1931.[1] [2] William Blanchard ran as an independent Labor candidate in protest at Luchetti's selection as Chifley's successor.
Their main opponent was William Hannam of the Liberal Party of Australia.[3] Vernon Moffitt, representing the Communist Party of Australia, also ran.
At the following 1954 general election Luchetti retained the seat and was the sole Labor candidate.[4]