Lex is a surname. Notable people with the surname include:
Alfred Lex (1913-1944), German Waffen-SS officer in World War II Hans Ritter von Lex (1893-1970), German politician and civil servant, and President of the German Red Cross Konrad Lex (born 1974), German ski mountaineer Stefan Lex (born 1989), German former professional footballer Sten Lex (born 1982), and Lex (born 1982), known as Sten & Lex, two Italian street artists
See also Alice Lex-Nerlinger (1893–1975), German artist in painting, photography, photomontage and photograms Laura Lexx (born 1986), British comedian