Westerman is a surname. Notable people with the surname include:Alan Westerman (1913–2001), senior Australian public servant
Alex Westerman, American creative director
Bruce Westerman, U.S. representative for Arkansas' 4th congressional district
Chantal Westerman, American actress and television correspondent
Floyd "Red Crow" Westerman (1936–2007), Lakota musician, songwriter, and actor
Gerardus Frederik Westerman (1807–1890), Dutch publisher and naturalist
Gwen Westerman, Dakota educator, writer, and artist
Joe Westerman, English rugby league footballer
John F. C. Westerman (1901–1991), English children's author
Harold Westerman (1917–2011), American college football and basketball coach
Helen Westerman (1926–2006), American baseball player
Percy F. Westerman (1876–1959), English children's author
Sian Westerman, British banker and fashion industry supporter
Tom Westerman Wolf, governor of Pennsylvania
Tracy Westerman, Indigenous Australian psychologist and writer
