Mark Byrne (born 9 November 1988) is an Irish footballer who plays as a midfielder for Crumlin United.

[4] On 13 March 2009, Byrne was sent on loan to Conference National side Burton Albion for the remainder of the season,[5] featuring in seven of the remaining eleven fixtures before being promoted, as champions, to the Football League.

On 20 July 2009, Byrne joined Conference National side Rushden & Diamonds on an initial six-month loan,[6] but eventually signed on for the rest of the season.

At the start of the 2010–11 season, he joined Barnet until 1 January 2011 when his loan spell was cut short due to injury.

[12] Byrne then consolidated his position within the Barnet first team, playing a central role in midfield, though at times, he was shifted on to the right wing.

In the following season, Byrne's position was shifted more prominently on to the right wing, fitting in with new player-manager Edgar Davids' 4–5–1 formation with two wingers, and three central midfielders.

[17] He scored his first goal for the club in the 2–1 win over Premier League side Watford in the second round of the 2016–17 EFL Cup.

[18] He signed a new two-year contract with the club in June 2018,[19] having been named the Player of the Season at the conclusion of the 2017–18 campaign.

[28] In 2005 Byrne won a bronze medal playing for Republic of Ireland U18 in the European Youth Olympic Festival.