Ian Henderson (born 23 April 1983 in Torquay, England) is a retired professional rugby league footballer who last played for the Sydney Roosters in the NRL. A Scotland international hooker, his brothers, Andrew Henderson and Kevin, are also international rugby league players.
Henderson was born in England but his family later moved to the Central Coast of Australia and he attended Terrigal High School.
He made his National Rugby League premiership début for the Sydney Roosters against the Parramatta Eels in round 1 of the 2003 NRL season. After two years at the Roosters he moved to Parramatta, however did not achieve more game time and left halfway through the 2005 NRL season.
Henderson signed with the Bradford Bulls in 2005, where he made a massive impact in helping Bradford win the championship. He played for the Bulls at hooker in their 2005 Super League Grand Final victory against the Leeds Rhinos. As Super League champions, Bradford played National Rugby League premiers Wests Tigers in the 2006 World Club Challenge. Henderson started at hooker in the Bulls' 30-10 victory. With the arrival of Terry Newton, Henderson found it hard to gain selection into the Bulls starting team. On 23 June 2007, the New Zealand Warriors announced they had signed Henderson for two years. The Hendersons are a Scottish family and all three brothers have played for Scotland at international level.
Henderson made his début for the Warriors in round 1 2008, playing against the Melbourne Storm. While a Warriors player, Henderson said Castleford, West Yorkshire was the worst place he had lived. He said that residents have rotten teeth, spend too much time drinking and need a bath. All three Henderson brothers featured in the Scotland squad for the 2008 Rugby League World Cup. In May 2009 the Warriors announced they had re-signed him until the end of the 2011 season.
On the 23 August, it was announced by the Warriors that they had released Henderson from the final year of his contract so he could sign a three-year deal with the Catalans Dragons in the Super League starting in 2011.
Henderson joined the Dragons in 2011. Henderson was again part of Scotland's 2013 Rugby League World Cup campaign.
On 3 August 2015, Henderson announced his return to Australia to play for his former club, the Sydney Roosters, in 2016. Henderson's move back to the NRL ended his five-year stay in France.
On 17 March 2016, Henderson suffered a broken leg in the Roosters' 0-40 defeat by the North Queensland Cowboys. This eventually lead him to announcing his retirement from rugby league later in the year.