Franzen or Franzén is a Scandinavian surname. Notable people with the surname include:
Anders Franzén (1918–1993), Swedish underwater archaeologist
Cola Franzen (b. 1923), American writer and translator
Frans Michael Franzén (1772–1847), Swedish poet
Ivar Franzén (1932–2004), Swedish politician
Johan Franzén (b. 1979), Swedish professional ice hockey player
Jonathan Franzen (b. 1959), American novelist and essayist
John Erik Franzén (b. 1942), Swedish artist
Mathias Franzén, Swedish handball player
Mia Franzén (b. 1971), Swedish politician
Michelle Franzen, American correspondent for NBC News
Nils Franzén (1910–1985), Swedish politician
Nils-Olof Franzén (1916–1997), Swedish author
Peter Franzén (b. 1971), Finnish actor
Peter Franzen, English journalist
Rikard Franzén (b. 1968), Swedish professional ice hockey player
Sixten Franzén (1919–2008), Swedish scientist
Torkel Franzén (1950–2006), Swedish academic