Farr is a surname, and may refer to:
- Bruce Farr (born 1949), New Zealand yacht designer
- Charles Farr (builder) (c. 1812–1888), timber merchant and builder in South Australia
- Charles Farr (civil servant) (1959–2019), British civil servant, intelligence officer, and diplomat
- Diane Farr (born 1969), American actress
- Felicia Farr (born 1932), American actress
- Finis Farr (1904–1982), American author
- Florence Farr (1860–1917), British stage actress and composer
- Gareth Farr (born 1968), New Zealand composer
- Gary Farr (1944–1994), English singer
- George Henry Farr (1819–1904), Anglican priest and headmaster in South Australia
- George W. Farr (1875–1957), Justice of the Montana Supreme Court
- Glenn Farr (1946–2023), film and TV editor
- Grahame Farr (1912–1983), maritime historian
- Heather Farr (1965–1993), American golfer
- Henry V. Farr (1877–1958), American industrial chemist (Mallinckrodt)
- Hilary Farr (born 1951), Canadian reality television personality
- Jack Farr (born 1946), US military intelligence officer
- James M. Farr (1874–1947), English language scholar and president of the University of Florida (1927–1928)
- Jamie Farr (born 1934), Lebanese-American actor
- Jim Farr (born 1956), American baseball player
- John Farr (disambiguation), several people including:
- John R. Farr (1857–1933), American politician
- John Farr (British politician) (1922–1997), Conservative Party politician
- John Farr, nom-de-plume of novelist Jack Webb
- Judi Farr (1938–2023), Australian actress
- Julia Farr (1824–1914), philanthropist in South Australia, wife of George Henry Farr
- Lorin Farr (1820–1909), Mormon pioneer
- Malcolm Farr (born 1951), Australian journalist
- Malcolm D. Farr (1884-1956), American businessman and politician
- A family of American football players:
- First generation (brothers):
- Miller Farr (1943–2023), cornerback
- Mel Farr (1944–2015), running back; also notable as a businessman
- Second generation (both sons of Mel):
- Mel Farr Jr. (b. 1966), running back
- Mike Farr (b. 1967), cornerback
- First generation (brothers):
- Nick Farr-Jones (b. 1962), former Australian rugby union player
- Patricia Farr (1913–1948), American movie actress
- Sam Farr (b. 1941), American politician
- Stephen Farr, British organist
- Steve Farr (b. 1956), American baseball player
- Tommy Farr (1913–1986), Welsh boxer
- Tracy Farr (b. 1962), New Zealand writer and scientist
- Tyler Farr (b. 1984), American country music singer
- Walter 'Snowy' Farr (1919–2007), English charity fundraiser
- Wanda Kirkbride Farr (1895–1983), American botanist
- William Farr (1807–1883), British epidemiologist
- William C. Farr (1841–1921), fifth Mayor of Bayonne, New Jersey