Jónsson is a surname of Icelandic origin, meaning son of Jón. In Icelandic names, the name is not strictly a surname, but a patronymic. The name refers to:

• Arnar Jónsson (actor) (born 1943), Icelandic actor
• Arnar Jónsson (basketball) (born 1983), Icelandic basketball player
• Arngrímur Jónsson “The Learned” (1568–1648), Icelandic scholar
• Bjarni Jónsson (1920–2016), Icelandic mathematician and logician
• Bjarni Jónsson (artist) (1934–2008), Icelandic painter
• Bjarni Jónsson (footballer) (born 1965), Icelandic international footballer
• Björn Jónsson (1846–1912), Icelandic prime minister
• Eggert Jónsson (born 1988), Icelandic footballer
• Einar Jónsson (1874–1954), Icelandic sculptor
• Emil Jónsson (1902–1986), Icelandic prime minister
• Finnur Jónsson (philologist) (1858–1934), Icelandic philologist
• Helgi Jónsson (1867–1925), Icelandic botanist and algologist
• Hjálmar Jónsson (disambiguation)
• Jón Jónsson, Icelandic singer
• Jón Sveinbjørn Jónsson (1955–2008), Norwegian poet
• Jóhannes Jónsson (1940–2013), Icelandic businessman
• Kristján Jónsson (politician) (1852–1926), Icelandic prime minister
• Magnús Jónsson (disambiguation)
• Ríkarður Jónsson (1888–1972), Icelandic sculptor
• Ríkharður Jónsson (1929–2017), Icelandic footballer
• Sigurður Jónsson (disambiguation)
• Sævar Jónsson (born 1957), Icelandic footballer
• Todi Jónsson (born 1972), Faroese footballer
• Ásgrímur Jónsson (1876–1958), Icelandic painter

• Jonsson
• Jönsson
• Jónsdóttir