Ahlin (also Åhlin) is a Swedish surname. People with the name include:

  • Cvetka Ahlin (1927–1985), Slovenian opera singer
  • Harry Ahlin (1900–1969), Swedish film actor
  • Karin Åhlin (1830-1899), Swedish educator
  • Lars Ahlin (1915–1997), Swedish author and aesthetician
  • Lennart Ahlin (1916–1995), Swedish sports shooter
  • Per Åhlin (1931–2023), Swedish artist and director of animated films
  • Rudy Ahlin (1914–1976), American ice hockey player
  • Tina Ahlin (born 1967), Swedish composer, pianist and singer
  • Urban Ahlin (born 1964), Swedish Social Democratic Party politician