Farnum is a surname that may refer to:
Billie S. Farnum (1916–1979), U.S. Representative and labor leader from Michigan Dorothy Farnum (1900–1970), American screenwriter Dustin Farnum (1874–1929), American singer, dancer and silent movie actor E. B. Farnum (1826–?), first mayor of Deadwood, South Dakota Fay Farnum (1888–1977), American mathematician Franklyn Farnum (1878–1961), American character actor Herbert Cyrus Farnum (1866–1926), American landscape painter John Egbert Farnum (1824–1870), United States Army brevet brigadier general of volunteers Dustine Farnum (1925-1983), American film and radio actress Kenneth Farnum (born 1931), Jamaican cyclist who competed in the 1952 Olympics Mark Farnum (c. 1896–1957), All-American college football player Marshall Farnum (1879–1917), American actor and film director Royal B. Farnum (1884–1967), American art educator and President of the Rochester Institute of Technology William Farnum (1876–1953), Hollywood film actor
See also Farnum Fish (1896–1978), early American airplane pilot Farnum House (disambiguation) Farnum Block, a commercial building in Uxbridge, Massachusetts, on the National Register of Historic Places Farnam (disambiguation) Farnham (disambiguation)