Muiris Ó Súilleabháin (1904–1950), (anglicized as Maurice O'Sullivan) was an Irish writer.
Other notable people named Maurice O'Sullivan include:
Maurice O'Sullivan (politician) (1892–1972), Australian politician Maurice J. O'Sullivan (born 1944), American historian Maurice O'Sullivan (boxer) (born 1952), British boxer
See also Maurice Sullivan (disambiguation)