Alan O'Connor (born 10 September 1992) is an Irish professional rugby union player who plays lock for Ulster.

[4] He appeared for the Ireland under-20s in the 2012 IRB Junior World Championship, bringing him to the attention of Allen Clarke, who signed him for Ulster's academy.

[3] He made 13 appearances for the senior Ulster team while still an academy player, making his debut against Leinster in December 2012.

[5] He made 14 starts in the 2016–17 season, winning 48 lineouts, third on the team behind Iain Henderson and Franco van der Merwe.

[6] In the 2017–18 season he made 24 appearances and led the team with 226 tackles,[7] and captained the side for the first time against the Southern Kings in February 2018.