2010 General Election - Lagan Valley
| Year | 2010 |
| General election | 2010 General Election |
| Constituency | Lagan Valley |
| Turnout | 55.1% |
Results
| Candidate | Party | Votes |
| Donaldson, Jeffrey | DUP | 18,199 |
| Trimble, Daphne | Ulster Conservatives and Unionists | 7,713 |
| Lunn, Trevor | Alliance | 4,174 |
| Harbinson, Keith | TUV | 3,154 |
| Heading, Brian | SDLP | 1,835 |
| Butler, Paul | Sinn Féin | 1,465 |