William Frederick Collings was seigneur of Sark from 1882 until his death. One of the most eccentric lords of the island, he was known for his anti-clericalism, stubbornness, intemperance and generosity.

The Seigneur of Sark is the head of Sark in the Channel Islands. "Seigneur" is the French word for "lord", and a female head of Sark is called Dame of Sark, of which there have been three. The husband of a female ruler of Sark is not a consort but is jure uxoris a seigneur himself.