Kevin John Ryan (born 20 June 1984) is an Irish actor, best known for his roles outside the US as DI Charlie Wild on the series Harry Wild, Det. Francis Maguire on BBC's Copper, Callum on The South Westerlies, and Chris on the series Raw. His best known American TV roles are as Patrick Ryan on Freeform's Guilt, John Pitcairn on the History Channel miniseries Sons of Liberty, and Finnegan on Crossbones.

He was married to actress Dedee Pfeiffer from 2009 to 2012; she is Michelle Pfeiffer's younger sister.