John Francary O'Reilly (born August 4, 1940) is a Canadian politician. He represented the riding of Haliburton—Kawartha Lakes—Brock from 1993 to 2004. O'Reilly represented the riding as a Liberal. Prior to serving as a Member of Parliament, he served as a councillor in Lindsay, Ontario. During his tenure, O'Reilly was re-elected twice, and served as the Parliamentary Secretary to the Minister of Defence from 2000 to 2003 under the Chrétien government. He unsuccessfully ran for re-election in 2004, and was succeeded by 1993 Reform Party candidate for the riding, Barry Devolin.[1] Following his defeat, he returned to his career as a real estate broker.