CONSTITUENCY RESULT : Portsmouth North
| Candidate name | Party | Gender | Number of votes | Share (%) | Change vs. 2017 for party (percentage points) | ||
| Penny Mordaunt | Conservative | Female | 28,172 | 61.4% | +6.6 | ||
| Amanda Martin | Labour | Female | 12,392 | 27.0% | -6.7 | ||
| Antonia Harrison | Liberal Democrat | Female | 3,419 | 7.4% | +1.9 | ||
| Lloyd Day | Green | Male | 1,304 | 2.8% | +1.2 | ||
| George Madgwick | Independent | Male | 623 | 1.4% | 0.0 |
| Election statistics | ||
| Majority | ||
| Votes | 15,780 | |
| Percent | 34.4% | |
| Rank (1 = highest %) | 196 | |
| Turnout | ||
| Constituency | 64.4% | |
| Region | 70.2% | |
| UK | 67.3% | |
| Constituency in 2017 | 66.1% | |
| Size of electorate | 71,299 | |
| Valid votes cast | 45,910 |