Daníelsson or Danielsson is a surname. Notable people with the surname include:
Alx Danielsson (born 1981), Swedish racing driver, 2006 champion of the Formula Renault 3.5 SeriesAnders Danielsson (born 1953), the current director-general for the Swedish Security ServiceAxel Danielsson (1863–1899), Swedish socialist agitator, journalist and writer, born in VärmlandBengt Danielsson (1921–1997), anthropologist and a crew member on the Kon-Tiki raft expedition from South America to French Polynesia in 1947Björn Danielsson (born 1977), retired Swedish professional ice hockey player currently assistant coachChristian Danielsson (born 1966), photographer from SwedenEinar Daníelsson (born 1970), retired footballerElma Danielsson (1865-1936), politician and journalistErik Danielsson of Watain, a Swedish black metal band from Uppsala, formed in 1998Gösta Danielsson (1912–1978), Swedish chess masterHelgi Daníelsson (footballer, born 1933), football player from IcelandHelgi Daníelsson (footballer, born 1981), football player from IcelandInge Danielsson (born 1941), Swedish former footballerJon Danielsson (born 1963), Icelandic economist teaching in the UKKikki Danielsson (born 1952), Swedish country, dansband and pop singerLars Danielsson (born 1958), Swedish jazz bassist, composer and record producerMats Danielsson, Swedish soldier who led the Swedish ISAF troops in Afghanistan during the war in AfghanistanMia Danielsson (born 1980), Swedish politicianNicklas Danielsson (born 1984), Swedish ice hockey playerPalle Danielsson (born 1946), Swedish jazz double bassist born in Stockholm, SwedenPeter Danielsson (born 1974), Swedish politician of the Moderate Party, member of the Riksdag 2002–2006, mayor of HelsingborgStaffan Danielsson (born 1947), Swedish Centre Party politician, and a member of the Riksdag since 2004Sven-Erik Danielsson (born 1960), Swedish cross country skier who competed from 1982 to 1998Tage Danielsson (1928–1985), Swedish author, actor, poet and film director