Winterhalder is a surname of German origin, meaning "winter slope", referring to someone who lived on a north-facing slope. Notable people with the surname include:
Edward Winterhalder (born 1955), American author Herbert Winterhalder (1879-1946), English footballer Johann Michael Winterhalder (1706-1759), German artist Josef Winterhalder the Elder (1702-1769), German sculptor Josef Winterhalder the Younger (1743-1807), German-Bohemian painter
See also Winterhalder & Hofmeier, a German clock manufacturing company Winterhalter