Le Bihan, or Bihan (meaning "small" in Breton), is a surname, and may refer to:
Clarisse Le Bihan (born 1994), French professional footballer Denis Le Bihan (born 1957), French medical doctor, physicist and neuroscientist Johann Le Bihan (born 1979), French retired medley swimmer Luc Bihan (born 1957), French sculptor, artist, graphic artist and animation director Mickaël Le Bihan (born 1990), French professional footballer Neil Le Bihan (1976 – 2023), English footballer Samuel Le Bihan (born 1965), French actor
The word is cognate with the Welsh word bychan and the surname Vaughan from which it derives.