Troubridge Island Lighthouse, Historical lighthouse on Troubridge Island, South Australia.

Troubridge Island Lighthouse stands on Troubridge Island in Gulf St Vincent, about 74 km southwest of Adelaide and 8 km southeast by east of Edithburgh on Yorke Peninsula. The decommissioned light is accompanied by the Troubridge Island Lighthouse Keepers' Cottages, and both are listed on the South Australian Heritage Register.

Built in 1856 to reduce shipwrecks on Troubridge Shoals, it was the second lighthouse constructed in South Australia. Its development came after Cape Willoughby had already proven the value of coastal navigation aids in the region.

Voitre Marek, a Czech-born surrealist who migrated to Adelaide in 1949, lived on the island with his wife and young children as lighthouse keeper from 1957 to 1960. He took the post after the Cape du Couedic Lighthouse was automated and demanned, so the keeper's cottages beside the tower are where the family lived.

The lighthouse sits on an island, requiring a boat trip to reach it, which limits visitor access. Weather conditions and rough seas can affect whether the site is accessible, so planning ahead is essential.

The lighthouse was listed on the now-defunct Register of the National Estate in 1978, and the tower with its keepers' cottages now stands on the South Australian Heritage Register. Both are visited as part of the Troubridge Island Conservation Park.