Dahll is a Norwegian surname. Notable people with the surname include:
Kygo (born Kyrre Gørvell-Dahll in 1991), Norwegian musician, DJ, songwriter and record producer Lars Christian Dahll (1823–1908), Norwegian military officer and politician Olaf Dahll (1889–1968), Norwegian competitive rower Tellef Dahll (1825–1893), Norwegian mineralogist and geologist Tellef Dahll Schweigaard (1806–1886), Norwegian politician
See also Dahl (surname)