Sundt is a Norwegian surname. Notable people with the surname include:
Arthur Sundt (1899–1971), Norwegian politician; Egil Sundt (1903–1950), Norwegian lawyer and civil servant; Eilert Sundt (1817–1875), Norwegian theologist and sociologist; Guy Sundt (1898–1955), American athlete, coach and athletics administrator; Halfdan Sundt (1873–1951), Norwegian physician and politician; Harald Sundt (1873–1952), Norwegian businessman; Michael Andreas Sundt, Norwegian politician; Morten Ludvig Sundt (1809–1891), Norwegian farmer and politician; Petter C. G. Sundt (1945–2007), Norwegian businessman; Vigleik Trygve Sundt (1873–1948), Norwegian lawyer, genealogist and politician.
See also Carl Sundt-Hansen (1841–1907), Norwegian-Danish painter Sundt Air, a Norwegian airline