Peter Murray Gavin (born 27 February 1949) is a former Australian politician.
He was born in Melbourne to James Murray Gavin and Amy Gullock, both public servants.
He attended Catholic schools in Melbourne before studying at La Trobe University, where he received a Bachelor of Arts and a Master of Business Administration.
In 1979 he was elected to the Victorian Legislative Assembly as the member for Coburg.
For the 1992 election, Gavin was forced to move to contest the seat of Tullamarine after Tom Roper, whose seat had been abolished, laid claim to Coburg, which was initially called Brunswick when the new electoral boundaries were released on 19 November 1990 and the Labor Party preselection nominations had to be submitted by the end of February 1991.