Riis is a surname. Notable people with the surname include:Asbjørn 'Bear' Riis, Danish professional wrestler Bendik Riis (1911–1988), Norwegian artist Bjarne Riis, 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 Jacob Riis (1849–1914), Danish-American journalist, photographer, and social reformer Hilde Riis, Norwegian cross-country skier Nelson Riis, Canadian businessman and former politician Povl Riis, Danish gastroenterologist Sharon Riis (1947-2016), Canadian writer
