Jason Alexander McCartney[1] (born 29 January 1968) is a British Conservative Party politician who was the member of Parliament (MP) for Colne Valley in West Yorkshire from 2019 to 2024, and from 2010 to 2017.

McCartney went on to serve as an officer in the Royal Air Force for nine years, fulfilling tours in Las Vegas, Turkey and Iraq.

McCartney changed party affiliation, and was selected as the Conservative prospective parliamentary candidate for Colne Valley in March 2007.

[8] McCartney stood in the 2010 general election, taking the Colne Valley seat with a majority of 4,837[9] and replacing Labour's incumbent Kali Mountford.

[2] He was one of the few Conservative Members of Parliament who voted against an increase to the cap on university tuition fees[13] and supported the need for a referendum on the EU.

[15] In the run up to the 2015 general election, McCartney took the unusual step of replying to a constituent who disagreed with the Coalition's austerity plan with a letter recommending they backed the Green Party candidate instead.

Labour accused him of trying to split the left wing vote, whilst McCartney said he often put constituents in touch with political rivals if he believed it could help.