Stirk is a surname of Norse origin. Notable people with the surname include:
Cornelius Stirk, fictional character Craig Stirk (born 1957), South African cricketer Graham Stirk, British architect Hellen Stirk (died 1544), Scottish Protestant martyr John Stirk (born 1955), English former football right-back Ryan Stirk (born 2000), English-born football midfielder Samuel Stirk (1756–1793), English attorney Sarah Stirk, British television presenter
See also Cattle#Terminology, a stirk is a yearling calf