1837 General Election - Merthyr Tydfil
| Year | 1837 |
| General election | 1837 General Election |
| Constituency | Merthyr Tydfil |
| Turnout | 76.3% |
Results
| Candidate | Party | Votes |
| Guest, John Josiah | Whig | 309 |
| Bruce, John Bruce | Conservative | 135 |
| Year | 1837 |
| General election | 1837 General Election |
| Constituency | Merthyr Tydfil |
| Turnout | 76.3% |
| Candidate | Party | Votes |
| Guest, John Josiah | Whig | 309 |
| Bruce, John Bruce | Conservative | 135 |