Martin O'Brien may refer to:
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Martin O'Brien (artist), British performance artist
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Martin O'Brien (journalist)
Martin O'Brien is an Irish journalist, newspaper columnist, broadcaster, media/communications consultant and speech writer. He specializes in religious affairs and is the Northern Correspondent of The Irish Catholic newspaper. He covered the elect ...
, Irish journalist
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Martin O'Brien (footballer) (1875–1946), Australian rules footballer
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Martin O'Brien (humanitarian)
Martin O’Brien (born in Belfast, Northern Ireland in October 1964) is a human rights activist and charity administrator in Northern Ireland.
Since 2004 O’Brien has been employed by Atlantic Philanthropies, a grant making programme which work ...
(born 1964), human rights activist and charity administrator in Northern Ireland
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Martin O'Brien (hurler) (1885–1958), Irish hurler
{{hndis, Obrien, Martin