Major General Colin Richard James Weir, CB, DSO, MBE (born 2 March 1971) is a retired senior British Army officer.

[1] He was educated at Portadown College, and graduated from Queen's University Belfast with a Bachelor of Arts degree in History.

[3] He was appointed commanding officer of the 1st Battalion of the Royal Irish Regiment in March 2010 and was deployed in that role to Afghanistan.

[2] He went on to be chief of staff for 1st (United Kingdom) Division in December 2012, commander of 16 Air Assault Brigade in July 2015,[4] and Assistant Chief of Staff (Operations) at Permanent Joint Headquarters in May 2017 before becoming General Officer Commanding 1st (United Kingdom) Division in November 2018.

[5] Weir was appointed chief of staff to the Field Army in 2020, and stepped down in July 2023.