Fien or Feen may refer to:

Fien

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  • Casey Fien (born 1983), American former Major League Baseball pitcher
  • Cassie Fien (born 1985), Australian marathon runner
  • Nathan Fien (born 1979), New Zealand former international rugby league footballer
  • Fien Delbaere (born 1996), Belgian racing cyclist
  • Fien van Eynde (born 1998), Belgian racing cyclist
  • Fien Troch (born 1978), Belgian film director, producer and screenwriter

Feen

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  • Maas van der Feen (1888–1973), Dutch tennis player
  • Paul van der Feen (born 1978), Dutch saxophonist