Henry Gilbert Irwin (March 21, 1925 – January 31, 2011) was a Canadian political figure in New Brunswick, Canada.
He represented Charlotte County in the Legislative Assembly of New Brunswick from 1960 to 1967 as a Liberal member.
He was born in Chamcook, New Brunswick, the son of George Lawson Irwin and Mary Craig.
Irwin was an unsuccessful candidate for a seat in the provincial assembly in 1956.
Irwin was chief electoral officer for the province in 1991[1] He died at a hospital in St. Stephen, New Brunswick in 2011.