Geoffrey Stewart (Geoff) Irwin (born 30 March 1948) is an Australian politician.
He was a Labor member of the New South Wales Legislative Assembly from 1984 to 1995.
His district was abolished at the 1988 state election, at which point he transferred to the similarly safe seat of Fairfield.
[1] Irwin was born in the western Sydney suburb of Guildford.
He is married to former federal Labor MP Julia Irwin.