Lincoln is a constituency in Lincolnshire, England represented in the House of Commons of the UK Parliament since 2019 by Karl McCartney, a Conservative Party politician.

Karl Ian McCartney is a British politician who served as Parliamentary Under-Secretary of State for Transport from July to September 2022. He is the Conservative Member of Parliament for Lincoln. He was first elected at the 2010 general election and represented the constituency until he was defeated by Labour's Karen Lee at the 2017 general election. He was re-elected at the 2019 general election.