Gormanston is a village in County Meath, Ireland. It is near the mouth of the River Delvin and the northern border of County Dublin.

Viscount Gormanston is a title in the Peerage of Ireland created in 1478 and held by the head of the Preston family, which hailed from Lancashire. It is the oldest vicomital title in the British Isles; the holder is Premier Viscount of Ireland.