Gerstner is a German surname. Notable people with the surname include:
Brad Gerstner (born 1971), American investor Eli Gerstner (born 1980), American singer/songwriter and producer František Josef Gerstner (1756–1832), Czech railway engineer Harry Gerstner (1884–19??), American woodworker and founder of H. Gerstner & Sons John Gerstner (1914–1996), American theologian and academic Lou Gerstner (1942–2025), American businessman, chairman and chief executive officer of IBM Sascha Gerstner (born 1977), German musician and photographer Siegfried Gerstner (1916–2013), German military officer and Knight's Cross recipient Thomas Gerstner (born 1966), German football manager and player Wulfram Gerstner, German/Swiss computational neuroscientist
See also 3887 Gerstner, main-belt asteroid