Sean Mannion may refer to:
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Sean Mannion (boxer)
Sean Mannion (born 6 October 1956 in Rosmuc, Ireland) is a former boxer in the light middleweight division. During his career he was based in and boxed out of Massachusetts in the United States. His most notable bout was against Mike McCallum fo ...
(born 1956), Irish boxer
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Sean Mannion (American football)
Sean Thomas Mannion (born April 25, 1992) is an American football quarterback who is a free agent. He played college football at Oregon State and was their starting quarterback from 2011 to 2014. He was drafted by the St. Louis Rams in the thir ...
(born 1992), American football quarterback
{{Hndis, Mannion, Sean