Jostein

• Jostein Helge Bernhardsen (born 1945), Norwegian diplomat
• Jostein Berntsen (born 1943), Norwegian politician for the Labour Party
• Jostein Erstad (1922–2011), Norwegian jurist
• Dag Jostein Fjærvoll (born 1947), Norwegian politician for the Christian People's Party
• Jostein Flo (born 1964), Norwegian former football player
• Jostein Gaarder (born 1952), Norwegian intellectual, author of several novels, short stories and children's books
• Jostein Goksøyr (1922–2000), Norwegian microbiologist
• Jostein Grindhaug (born 1973), Norwegian football coach and former player
• Jostein Hasselgård (born 1979), the winner of Norway's national pre-selection for the Eurovision Song Contest 2003
• Arne Jostein Ingebrethsen (1903–1945), Norwegian newspaper editor killed during the occupation of Norway by Nazi Germany
• Jostein Løfsgaard (1923–2011), Norwegian academic executive
• Jostein Nerbøvik (1938–2004), Norwegian historian
• Jostein Nyhamar (1922–1993), Norwegian magazine editor, biographer and politician for the Labour Party
• Jostein Pedersen (born 1959), Norwegian musical journalist and reporter, television commentator and "music intelligencia"
• Jostein Rise (born 1945), Norwegian social psychologist
• Kåre Jostein Simonsen (born 1948), Norwegian bandoneonist
• Jostein Stige (born 1954), Norwegian sprint canoeist who competed in the mid 1970s
• Jostein Wilmann (born 1953), former Norwegian professional road racing cyclist