Sivertsen is a surname. Notable people with the surname include:
Adelsten Sivertsen (born 1925), Norwegian businesspersonCort Sivertsen (1622–1675), Norwegian seamanEirik Sivertsen (born 1971), Norwegian politicianHalvdan Sivertsen (born 1950), Norwegian singer-songwriter and guitaristHelge Sivertsen (1913–1986), Norwegian discus thrower and politicianJan Sivertsen (born 1951), Danish painterKenneth Sivertsen (musician) (1961–2006), Norwegian musician, composer, poet, and comedianKenneth Sivertsen (skier) (born 1973), Norwegian alpine skierOdin Sivertsen (1914–2008), Norwegian politicianSigvard Sivertsen (1881–1963), Norwegian gymnast and Olympic competitorStian Sivertsen (born 1989), Norwegian snowboarderSture Sivertsen (born 1966), former Norwegian Cross-country skier