A by-election was held for the New South Wales Legislative Assembly seat of Murray on 13 September 1980.
It was triggered by the death of Mary Meillon (Liberal).
[1] The seat had not been contested by the Country party since 1973 as the Coalition agreement prohibited the party from endorsing candidates to run against sitting Liberals.
Tim Fischer (Country) was the member for Sturt and resigned to contest the by-election.
[3] By-elections for the seats of Bankstown and Ku-ring-gai were held on the same day.