Stelfox is a surname. Notable people with the surname include:
Arthur Wilson Stelfox (1883–1972), Irish naturalist and architect Dawson Stelfox (born 1958), Northern Irish architect James Stelfox (born 1976), English musician Margarita Dawson Stelfox (1886–1971), Irish botanist Shirley Stelfox (1941–2015), English actress