Fick may refer to:
- Adolf Eugen Fick (1829-1901), German physiologist, after whom are named:
- Fick's law of diffusion, describing the diffusion.
- Fick principle, technique for measuring the cardiac output.
- tonometer, both useful in music and ophthalmology
- Adolf Gaston Eugen Fick (1852-1937), German ophthalmologist nephew of Adolf Eugen Fick, inventor of the contact lens.
- August Fick (1833-1916), German philologist
- Carl Fick (born 1918), American writer and director
- Chuckie Fick (born 1985), American baseball player
- Emil Fick (1863-1930), Swedish fencer
- Franz Ludwig Fick (1813-1858), German anatomist
- Jacob Fick (1912-2004), German SS officer
- John Fick (1921-1958), American baseball player
- Leonard J. Fick (1915-1990), American Catholic priest
- Tilla Fick (born 1954), South African academic
- Nathaniel Fick (born 1977), US Marine Corps officer
- Peter Fick (1913-1980), American swimmer
- Robert Fick (born 1974), American baseball player
- Roderich Fick (1886-1955), German architect
- Sigrid Fick (1887-1979), Swedish tennis player
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