Kälin or Kaelin is a surname, and may refer to:
- Alfred Kälin (born 1949), former Swiss cross country skier
- Alois Kälin (born 1939), former Swiss Nordic skier
- Charles S. Kaelin (1858-1929), American painter
- Karl Kälin (born 1943), Swiss psychologist
- Kato Kaelin (born 1959), American actor
- Urs Kälin (born 1966), Swiss former alpine skier
- Walter Kälin (born 1951), Swiss humanitarian, constitutional lawyer and international human rights lawyer
- See also
- Kalin (disambiguation)
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