Gerstner is a German surname. Notable people with the surname include:
Eli Gerstner (born 1980), American Orthodox Jewish singer/songwriter and producerFrantišek Josef Gerstner (1756–1832), Czech railway engineerFrantišek Antonín Gerstner (1795–1840), Czech railway engineerHarry Gerstner (born 1884), American woodworker and founder of H. Gerstner & SonsJohn Gerstner (1914–1996), Professor of Church HistoryLouis V. Gerstner, Jr. (born 1942), chairman of the board and CEO of IBMSascha Gerstner (born 1977), German musician and photographerSiegfried Gerstner (1916–2013), German military officer and Knight's Cross recipientThomas Gerstner (born 1966), German football manager and player