Maurice O'Sullivan (5 October 1892 – 25 August 1972), an Australian politician, was a member of the New South Wales Legislative Assembly from 1927 until 1959.

O'Sullivan was born in Paddington, New South Wales and was the son of a publican.

He was educated at the Christian Brother's School, Paddington and initially worked as an apprentice coach painter with the New South Wales Government Railways.

He became active in the Federated Coachmakers' Employees Union but took over the licence of his father's hotel, The Lord Dudley, and then continued in a career as a publican.

The sitting Nationalist member for Paddington, Daniel Levy, successfully contested Woolahra.