Con O'Brien may refer to:
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Con O'Brien (American football) (1898–1993), American football player and police officer
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Con O'Brien (politician)
Bartholomew Cornelius "Con" O'Brien (20 April 1866 – 11 December 1938) was an Australian politician who served as a Labor Party member of the Legislative Council of Western Australia from 1901 to 1904 and again from 1908 to 1914.
O'Brien was ...
(1866–1938), Australian politician
{{hndis, OBrien, Con