[1] Named by the UK-APC in 1958 after the Spanish vessel San Telmo commanded by Captain Rosendo Porlier, which was the flagship of a Spanish naval squadron bound for Callao (Peru) to reinforce colonial forces there fighting the independence movements in Spanish America.

Some of her spars and her anchor-stock were found by sealers on nearby Half Moon Beach in about 1821.

[2] The island, along with nearby Cape Shirreff, has been designated an Antarctic Specially Protected Area (ASPA 149) for the diversity of its plant and animal life, especially its penguin and fur seal breeding colonies.

[2] This article incorporates public domain material from "San Telmo Island".

This Livingston Island location article is a stub.