CONSTITUENCY RESULT : Watford
| Candidate name | Party | Gender | Number of votes | Share (%) | Change vs. 2017 for party (percentage points) | ||
| Dean Russell | Conservative | Male | 26,421 | 45.5% | -0.1 | ||
| Chris Ostrowski | Labour | Male | 21,988 | 37.9% | -4.2 | ||
| Ian Stotesbury | Liberal Democrat | Male | 9,323 | 16.1% | +7.0 | ||
| Michael McGetrick | Social Democratic Party | Male | 333 | 0.6% | 0.0 |
| Election statistics | ||
| Majority | ||
| Votes | 4,433 | |
| Percent | 7.6% | |
| Rank (1 = highest %) | 551 | |
| Turnout | ||
| Constituency | 69.7% | |
| Region | 68.2% | |
| UK | 67.3% | |
| Constituency in 2017 | 67.8% | |
| Size of electorate | 83,359 | |
| Valid votes cast | 58,065 |