Iain Henderson

Iain Henderson
Henderson in 2017
Full nameWilliam Iain Henderson
Born (1992-02-21) 21 February 1992
Craigavon, Northern Ireland
Height1.99 m (6 ft 6 in)
Weight118 kg (260 lb; 18 st 8 lb)
SchoolBelfast Royal Academy
UniversityQueen's University Belfast
Rugby union career
Position(s) Lock, flanker
Current team Ulster
Senior career
Years Team Apps (Points)
2012– Ulster 171 (75)
Correct as of 28 February 2026
International career
Years Team Apps (Points)
2011–2012 Ireland U20 20 (20)
2012– Ireland 86 (30)
2014–2015 Ireland Wolfhounds 2 (0)
2017, 2021 British & Irish Lions 0 (0)
Correct as of 1 November 2025

William Iain Henderson (born 21 February 1992) is an Irish rugby union player from Northern Ireland who plays as a lock for United Rugby Championship club Ulster and the Ireland national team. He has been selected for two tours with the British & Irish Lions. Henderson has been the captain of Ulster since 2019 and captained Ireland in 2021 and 2023.