Sommerfeldt is a surname. Notable people with the surname include:
Christian Sommerfeldt (1746–1811), Norwegian geographer and civil servantEinar Sommerfeldt (1889–1976), Norwegian rowerGunnar Sommerfeldt (1890–1947), Danish actor and film directorHakon Adelsteen Sommerfeldt (1811–1888), Norwegian naval officer and ship designerHarald Sommerfeldt (1886–1966), Norwegian businessmanRené Sommerfeldt (born 1974), German cross-country skierWilhelm Preus Sommerfeldt (1881–1957), Norwegian bibliographer and librarian