Theresa Alice "Tessie" Fair (June 30, 1871 – November 22, 1926) was an American socialite. She went from being the daughter of a hard-scrabble California miner to become heiress to a fortune in Comstock Lode gold and silver, the wife of steamship magnate Hermann Oelrichs, mistress of the Rosecliff estate in Newport, Rhode Island, and a member of the elite "Triumvirate" of American society."