Great Grimsby is a constituency in North East Lincolnshire represented in the House of Commons of the Parliament of the United Kingdom since December 2019 by Lia Nici of the Conservative Party. Between 1918 and 1983 it was known simply as Grimsby; following the 2023 Periodic Review of Westminster constituencies, the seat will be subject to boundary changes which will incorporate the neighbouring town of Cleethorpes. As a consequence, it will be renamed Great Grimsby and Cleethorpes, to be first contested at the next general election.

Lia Nici-Townend is a British Conservative Party politician. She has been Member of Parliament (MP) for Great Grimsby since the 2019 general election. She served as an Assistant Government Whip from September to October 2022.