James Roger Cartlidge (born 30 April 1974) is a British politician who has served as the Member of Parliament (MP) for South Suffolk since 2015.

[6] In July 2015, in one of his first actions in Parliament, Cartlidge brought a barrel of local beer from his constituency into the House of Commons to drink with his new parliamentary colleagues.

[18] He has publicly expressed his strong support for equal marriage but voted against imposing this law in Northern Ireland 'in absentia'.

[20] In October 2020, Cartlidge wrote in the East Anglian Daily Times that COVID-19 exacerbated the need for part-time season rail tickets.

[21] On 17 September 2021, Cartlidge was appointed Parliamentary Under-Secretary of State for Justice and an Assistant Government Whip in the Cabinet reshuffle.

On his last day in office, he oversaw clauses of the Finance Bill introducing a new lower rate of alcohol duty specifically for draught beer and cider.

[28] On 28 February 2024, in a Commons Oral Statement he set out plans to overhaul defence acquisition, introducing a new Integrated Procurement Model.