CONSTITUENCY RESULT : Horsham
| Candidate name | Party | Gender | Number of votes | Share (%) | Change vs. 2017 for party (percentage points) | ||
| Jeremy Quin | Conservative | Male | 35,900 | 56.8% | -2.8 | ||
| Louise Potter | Liberal Democrat | Female | 14,773 | 23.4% | +11.0 | ||
| Michael Jones | Labour | Male | 9,424 | 14.9% | -6.8 | ||
| Catherine Ross | Green | Female | 2,668 | 4.2% | +1.2 | ||
| Jim Duggan | The Peace Party | Male | 477 | 0.8% | +0.3 |
| Election statistics | ||
| Majority | ||
| Votes | 21,127 | |
| Percent | 33.4% | |
| Rank (1 = highest %) | 205 | |
| Turnout | ||
| Constituency | 72.9% | |
| Region | 70.2% | |
| UK | 67.3% | |
| Constituency in 2017 | 74.9% | |
| Size of electorate | 86,730 | |
| Valid votes cast | 63,242 |