Dennis Fowles (born 8 April 1951) is a Welsh former runner, who came third at the 1984 London Marathon.

Fowles trained at Cardiff Amateur Athletic Club.

[3] Fowles' first marathon event was at the 1982 Commonwealth Games in Brisbane, where he finished 13th.

[2] Fowles came third at the 1984 London Marathon after overtaking Norwegian Øyvind Dahl in the last kilometre of the race.

[5] In 1985, Fowles won the inaugural City of Norwich Half Marathon in a time of 1:05:11.