Osterman is a surname. Notable people with the surname include:Andrei Osterman (1686–1747), Russian statesman Cat Osterman, American softball player Harry Osterman, Chicago politician Ivan Osterman (1725-1811), Russian statesman Kathryn Osterman (1883-1956), American actress Lynne Osterman, American politician from Minnesota J.P. Osterman, American writer of science fiction
