Gustavus Hamilton
Gustavus Hamilton may refer to:
- Gustavus Hamilton, 1st Viscount Boyne, Vice-Admiral of Ulster, Irish MP for Donegal County 1692–1713 and Strabane
- Gustavus Hamilton (politician), son of Gustavus Hamilton, 1st Viscount Boyne, Irish MP for Donegal County 1716–35
- Gustavus Hamilton, 2nd Viscount Boyne, Irish peer, English MP for Newtown
- Gustavus Hamilton (painter), Irish painter