Sir Phillip Reginald Lynch KCMG (27 July 1933 – 19 June 1984) was an Australian politician who served in the House of Representatives from 1966 to 1982.

Lynch was born in Melbourne and worked as a school teacher and management consultant before entering politics.

He was elected deputy leader of the Liberal Party in 1972, serving first under Billy Snedden and later under Malcolm Fraser.

Lynch first stood for parliament at the 1955 federal election, aged 22, running in the safe Labor seat of Scullin.

A conciliating presence between opposing factions both within and outside his party, he was also partly responsible for exposing the Khemlani loans affair that, although Lynch was not actively involved, was to contribute to the dismissal of the Whitlam government and election of Malcolm Fraser as Prime Minister in 1975.

[5] He was forced to resign from the ministry on 19 November 1977 when it became known that he was using a family trust to minimise his tax obligations, which was perceived as a conflict of interest.

[6][7] After the 1980 election, Fraser formed the Committee of Review of Government Functions, popularly known as the "Razor Gang", which Lynch chaired.

[8] He was also challenged again for the deputy leadership this time by Minister for Foreign Affairs Andrew Peacock, who he defeated by 47 votes to 35.

Sir Phillip's wife, Leah O'Toole, had been a boarder at St Ann's Ladies' College, Warrnambool and later worked as an occupational therapist and as company secretary and director of Denistoun Pty Ltd.[11][2] Sir Phillip and Lady Leah Lynch had three sons.