1987 General Election - Ynys Môn
| Year | 1987 |
| General election | 1987 General Election |
| Constituency | Ynys Môn |
| Turnout | 81.7% |
Results
| Candidate | Party | Votes |
| Jones, Ieuan | Plaid Cymru | 18,580 |
| Evans, Roger | Conservative | 14,282 |
| Parry, Colin | Labour | 7,252 |
| Evans, Ieuan | Social Democratic | 2,863 |