CONSTITUENCY RESULT : Carmarthen East and Dinefwr
| Candidate name | Party | Gender | Number of votes | Share (%) | Change vs. 2017 for party (percentage points) | ||
| Jonathan Edwards | Plaid Cymru | Male | 15,939 | 38.9% | -0.4 | ||
| Havard Hughes | Conservative | Male | 14,130 | 34.5% | +8.2 | ||
| Maria Carroll | Labour | Female | 8,622 | 21.0% | -8.8 | ||
| Pete Prosser | Brexit Party | Male | 2,311 | 5.6% | 0.0 |
| Election statistics | ||
| Majority | ||
| Votes | 1,809 | |
| Percent | 4.4% | |
| Rank (1 = highest %) | 588 | |
| Turnout | ||
| Constituency | 71.4% | |
| Region | 66.6% | |
| UK | 67.3% | |
| Constituency in 2017 | 73.3% | |
| Size of electorate | 57,419 | |
| Valid votes cast | 41,002 |