Des O'Neil

The Honourable Sir Des O'Neil
Deputy Premier of Western Australia
In office 5 June 1975 – 5 March 1980
Premier	Sir Charles Court
Preceded by	Ray McPharlin
Succeeded by	Ray O'Connor
Deputy Leader of the Liberal Party in Western Australia
In office 5 June 1972 – 5 March 1980
Preceded by	Charles Court
Succeeded by	Ray O'Connor
Member of the Legislative Assembly of Western Australia
In office 21 March 1959 – 31 March 1962
Preceded by	William Gaffy
Succeeded by	Don May
Constituency	Canning
In office 31 March 1962 – 23 February 1980
Preceded by	None (new seat)
Succeeded by	Anthony Trethowan
Constituency	East Melville
Personal details
Born	(1920-09-27)27 September 1920 Subiaco, Western Australia, Australia
Died	25 September 1999(1999-09-25) (aged 78) Wilson, Western Australia, Australia
Political party	Liberal

Sir Desmond Henry O'Neil (27 September 1920 – 25 September 1999) was an Australian politician who was a Liberal Party member of the Legislative Assembly of Western Australia from 1959 to 1980. He was a minister in the governments of Sir David Brand and Sir Charles Court, and served as deputy premier to Court between 1975 and 1980.