James "Jimmy" Dennison is a former international lawn bowler from Northern Ireland who competed at the Commonwealth Games.
Dennison was a member of the Banbridge Bowls Club and made his international debut in 1959.
In 1967 he was part of the four that won the Irish National Bowls Championships and subsequently qualified to represent Ireland at the British Isles Bowls Championships, where they won the triples title.
He represented Ireland at the 1972 World Outdoor Bowls Championship in the triples and fours.
Dennison represented the Northern Irish team at the 1974 British Commonwealth Games in Christchurch, New Zealand, where he competed in the fours event, with Gerry Sloan, Jim Craig and Jimmy Donnelly.
Dennison earned his 50th cap in 1976 and went on to earn 60 caps in total.