Frederick Hasselborough, whose surname is also spelled Hasselburgh and Hasselburg, is an Australian sealer from Sydney who discovers Campbell Island, in the sub-Antarctic region, on January 4, 1810, and the Macquarie Islands, both uninhabited, on July 11, 1810).

He claims both for Britian and annexes them it to the colony of New South Wales.

Hasselborough makes his discoveries on the sealing brig Perseverance, which is owned by shipowner Robert Campbell's Sydney-based company Campbell & Co. (whence the island's name).

Hasselborough reports a wreck "of ancient design" on Macquarie Island (named for Lachlan Macquarie, installed on January 1 as the governor of New South Wales) which has given rise to speculation that the island may have been visited before by Polynesians or others

Captain Hasselborough is drowned on November 4, 1810, in Perseverance Harbour, the long fjord that nearly bisects Campbell island, opening out to sea on the east coast.