Thull is a surname. Notable people with the surname include:
Hans Rudolf Thull (born 1945), German artist Ketty Thull (1905–1987), Luxembourg cook, educator and cookbook writer Marcel Thull (born 1951), Luxembourgish cyclist who competed at the 1976 Summer Olympics Roger Thull (born 1939), Luxembourgish cyclist who competed at the 1960 Summer Olympics
See also
Thul, a town of Jacobabad District, Sindh Province, Pakistan