Portsmouth North is a constituency[n 1] represented in the House of Commons of the UK Parliament by Amanda Martin of the Labour Party since 2024.

[n 2] As its name suggests, the constituency covers the northern portion of the city of Portsmouth in Hampshire.

It was abolished for the 1950 general election and largely replaced by a new Portsmouth West constituency as the axis of division changed, but was re-established for the February 1974 general election.

[4] Compared to Portsmouth South, it has a lower proportion of public sector workers, students and ethnic minorities.

The seat is currently in Labour hands, but very narrowly, with the former Conservative MP and leadership candidate Penny Mordaunt commanding a large personal following.