Bäck is a surname of Swedish descent, meaning "brook", "stream" (related to Old Norse bekkr).

Notable people Notable people with this surname include:

Abraham Bäck (1713–1795), Swedish physician Airi Bäck (born 1993), Finnish badminton playe Axel Bäck (1987), alpine skier from Sweden Elmer Bäck (1981), Finnish actor Immanuel Bäck (1876–1939), Finnish Lutheran clergyman and politician Johannes Bäck (1872–1952), Finnish Lutheran clergyman and politician Oskar Bäck (2000), Swedish professional ice hockey forward Sven-Erik Bäck (1919–1994), Swedish composer of classical music

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