Robert McAllister (January 9, 1876 – October 10, 1963) was a businessman and politician in New Brunswick, Canada. He represented St. John County in the Legislative Assembly of New Brunswick as a Conservative member from 1931 to 1960.
He was the son of James McAllister and Jessie Main, both of Scottish origin.
He was first elected to the provincial assembly in a 1931 by-election held after John M. Baxter was appointed a judge.
In 1902, McAllister married a Miss Humphrey. He was a dyer and cleaner. McAllister served as county warden. He was a member of the Knights of Pythias.
He died in 1963 of arteriosclerosis.