1929 General Election - Caithness and Sutherland
| Year | 1929 |
| General election | 1929 General Election |
| Constituency | Caithness and Sutherland |
| Turnout | 66.5% |
Results
| Candidate | Party | Votes |
| Sinclair, Archibald Henry Macdonald | Liberal | 13,462 |
| Duncan, James Alexander Lawson | Scottish Unionist | 3,041 |
| Oman, Charles | Independent Labour | 1,711 |