The ruin on Great Thatch.

Great Thatch is an uninhabited island of the British Virgin Islands in the Caribbean. It is one of the westernmost islands in the Territory. It is believed to take its name from the famous pirate, Edward Teach (better known as "Blackbeard"), although there is little evidence Blackbeard ever sailed in the Virgin Islands.

Although presently uninhabited, it was formerly occupied, and boasted a customs house and mail exchange where the mail would be delivered from Charlotte Amalie by skiff after the packet ships had called there.

There remains a significant ruin on the island, although it is extremely difficult to access as the paths are all heavily overgrown. At the property a significant civil disturbance occurred on the island in 1856 where local law enforcement officers were beaten in a smuggling dispute.

The island was formerly in private hands, but was repurchased by the Government of the Territory in September 1997, and is now a national park.

Islands of the British Virgin Islands Anegada Beef Island Bellamy Cay Buck Island Carvel Rock Cockroach Island Cooper Island Dead Chest Island Diamond Cay Dog Islands East Seal Dog Island Eustatia Fallen Jerusalem Island Frenchman's Cay George Dog Island Ginger Island Great Camanoe Great Dog Island Great Thatch Great Tobago Island Green Cay Guana Island The Indians Jost Van Dyke Little Camanoe Little Jost Van Dyke Little Thatch Little Tobago Little Wickmans Cay Marina Cay Mosquito Island Nanny Cay Necker Island Norman Island Old Jerusalem Island Pelican Island Peter Island Prickly Pear Round Rock Saba Rock Salt Island Sandy Cay Sandy Spit Scrub Island Tortola Virgin Gorda West Dog Island

Coordinates: 18°23′N 64°43′W / 18.383°N 64.717°W / 18.383; -64.717