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. Since the split of the seat City of York with effect from the 2010 general election, Lincoln has been the oldest constituency in continuous existence in the UK – established in 1265. Lincoln was a bellwether between 1974 and 2017. The seat bucked the national Conservative victory in 1970 by electing a Labour MP, as it did in 2017.