Dean Byrne (11 September 1984) is an Irish professional boxer who fought in the light welterweight class.
Byrne, nicknamed "Irish Lightning", had vast experience boxing as an amateur fighting out of Crumlin ABC and during his 200 amateur fights he became Irish national intermediate light welterweight champion also represented Ireland at international level.
[citation needed] Following the Irish senior championships, Byrne then emigrated to Australia where he then turned professional and had his first pro fight in February 2006.
When, just 8 days after winning a Unanimous decision over Michael Frontin, Byrne took a major step up in class facing France's IBF International Light-Middleweight Champion, Frank Haroche Horta (then 26–8).
Exactly six months later, Byrne fought the then 5–0 unbeaten Terry Holmes of England, and lost a narrow points decision over 8 rounds.