Wienholt is a surname. Notable people with the surname include:
Anne Wienholt (1920–2018), Australian artist Arnold Wienholt Sr. (1826–1895), Australian politician from Queensland Arnold Wienholt (1877–1940), Australian grazier, author and politician Edward Wienholt (1833–1904), Australian politician from Queensland Louis Wienholt (1918–1973), Australian public servant