Riis is a surname. Notable people with the surname include: Asbjørn 'Bear' Riis (born 1957), Danish professional wrestler Bendik Riis (1911–1988), Norwegian artist Bjarne Riis (born 1964), Danish former professional road bicycle racer turned team owner and manager Einar Riis (1922–2006), Norwegian aircraft broker and consul in Rome Fredrik Riis (1789–1845), Norwegian county governor Hilde Riis (born 1959), Norwegian cross-country skier Jacob Riis (1849–1914), Danish-American journalist, photographer, and social reformer Joachim Riis (born 1989), Danish politician Nelson Riis (born 1942), Canadian businessman and former politician Povl Riis (1925–2017), Danish gastroenterologist Sharon Riis (1947–2016), Canadian writer