Bull is a surname.
In addition to people bearing "Bull" as an Old World-derived surname, "Bull" has been part of the names of some Native Americans, in some cases as part of a traditional name of their respective cultures. Some of these, and some others, either have borne it as part of a legal surname or (with or without their assent) been treated as bearing it.
Those bearing Bull as a surname include:
- Alfred E. Bull (1867–1930), American football player and coach
- Amos Bull (1744–1825), one of America's first composers
- Amos Bad Heart Bull (c. 1868 – 1913), Oglala Lakota artist, son of Bad Heart Bull, passed that whole name on to both his sons in surname fashion
- Amy Bull (1877–1953), British suffragist and rural district councillor
- Anders Henrik Bull (1875 – 1956), Norwegian electrical engineer
- Anders Sandøe Ørsted Bull (1817–1907), Norwegian politician and mayor of Oslo
- Andy Bull, an Australian singer-songwriter from Sydney
- Anthony Bull (1908–2004), British transport engineer and president of the Institute of Transport
- Bart Bull, American writer, reporter, author, columnist, and critic
- Bartle Bull (born 1970), American writer, magazine editor and journalist
- Ben Bull, English footballer
- Benjamin Bull (1798–1879), American lawyer and politician
- Bernt Bull (born 1946), Norwegian politician for the Labour Party
- Brynjulf Bull (1906–1993), Norwegian lawyer, Supreme Court advocate and politician
- Bull (fl. 1871), Kent cricketer with unknown given name
- Cavinder Bull, Singaporean lawyer
- Charlie Bull (1909–1939), English cricketer
- Charles Livingston Bull (1874–1932), American illustrator
- Clarence Sinclair Bull (1896–1979), American portrait photographer
- Clive Bull (born 1959), English radio talk show host
- Dan Bull (born 1986), British rapper
- David Bull (television presenter) (born 1969), British television commentator and former doctor
- David Bull (Scouting), British scouting commissioner
- Deborah Bull (born 1963), English dancer, writer, and broadcaster
- Dixie Bull (fl. 1630s), English sea captain and pirate
- Donald Bull, rugby union player who represented Australia
- Edvard Bull, several people
- Edward Bull (c.1759–1798), English steam engine engineer
- Eleanor Bull (1550–1596), owned establishment where Christopher Marlowe, the Elizabethan playwright and poet, died in 1593
- Emma Bull (born 1954), American science fiction and fantasy author
- Ephraim Wales Bull (1806–1895), American farmer and politician, inventor of the Concord grape
- Fran Bull (born 1938), American artist
- Francis Bull (1887–1974), Norwegian literary historian, professor at University of Oslo
- Frederick Bull (1875–1910), English cricketer who played for Essex
- Fredrik Rosing Bull (1882–1925), Norwegian engineer and Information technology pioneer
- Gary Bull (born 1966), an English footballer
- Geoff Bull (born 1942), an Australian jazz trumpeter and bandleader
- Geoffrey Bull (1921–1999), a Scottish Christian missionary and author
- Georg Andreas Bull (1829–1917), Norwegian architect and chief building inspector
- Georg Jacob Bull (1785–1854), a Norwegian jurist and politician
- George Bull (1634–1710), English theologian and Bishop of St David's
- George Bull (cricketer), English cricketer of the 1900s
- Gerald Bull (1928–1990), Canadian engineer
- Graham MacGregor Bull (1918–1987), South African and British physician
- Grant Short Bull (c. 1851–1935), Lakota leader; passed Short Bull on to both his sons in surname fashion
- Harcourt Burland Bull (1824–1881), Canadian journalist and political figure
- Harold R. Bull (1893–1976), Assistant Chief of Staff, Supreme Headquarters Allied Expeditionary Force (SHAEF) under Dwight D. Eisenhower
- Hedley Bull (1932–1985), Australian-born political scientist
- Henrik Bull (1864–1953), Norwegian architect and designer
- Henrik H Bull (1929–2013), a founder of Bull Stockwell Allen Architects in San Francisco
- Henrik Johan Bull, Norwegian businessman who patented the grenade-harpoon gun used for whaling
- Henry Bull (settler) (1799–1848), an early settler in the Swan River Colony, served in British Navy
- Henry Bull (governor) (1610–1694), early colonial Governor of Rhode Island
- Henry Graves Bull (1818–1885), English medical doctor, botanist, and mycologist
- Hiram C. Bull (1820–1879), American politician
- Jacob Breda Bull (1853–1930), a Norwegian author
- James J. Bull, Professor in Molecular Biology at the University of Texas at Austin
- Jan Bull (1927–1985), Norwegian author and theater instructor
- Jens Bull (1886–1956), Norwegian jurist and diplomat
- Johan Lausen Bull (1751–1817), Norwegian jurist and politician
- Johan Randulf Bull (1749–1829), Norwegian judge
- John Bull, several people
- Karl Sigwald Johannes Bull, (1860–1936), Norwegian Minister of Defence from 1910 to 1912
- Knud Bull (1811–1889), Norwegian painter and counterfeiter
- Lucien Bull (1876–1972), Irish-born French pioneer in chronophotography
- Lyder Bull (1881–1959), Norwegian civil servant
- Marcus Bull (born 1962), British historian
- Marie Magdalene Bull (1827–1907), Norwegian actress and photographer
- Melville Bull (1854–1909), U.S. Representative from Rhode Island
- Mette Bull (1876–1946), Norwegian actress
- Mike Bull (born 1946), pole vaulter and decathlete from Northern Ireland
- Moses Bull (1830–1896), American politician
- Nikki Bull (born 1981), English footballer
- Norma Bull (1906–1980), Australian artist
- Obadiah Bull, Irish lawyer during the reign of Henry VII, who coined the phrase "that's Bull"
- Olaf Bull (1883–1933), Norwegian poet
- Ole Bull (1810–1880), Norwegian violinist
- Ole Bornemann Bull (physician) (1842–1916), Norwegian ophthalmologist
- Peter Bull (1912–1984), British character actor
- René Bull (1872–1942), British illustrator and photographer
- Richard Bull, several people
- Richard Bull (actor) (1924–2014), American film actor, stage actor and television actor
- Richard Bull (aviator) (1914–1942), United States Navy aviator during World War II
- Richard Bull (Australian politician) (born 1946), Australian politician
- Richard S. Bull (1913–1942), earned the Distinguished Flying Cross during World War II
- Robert Bull (1778–1835), British Royal Horse Artillery officer who fought in the Napoleonic Wars
- Ronnie Bull (footballer) (born 1980), English footballer
- Ronnie Bull (American football) (born 1940), American football running back
- Roy Bull (1929–2004), Australian rugby player and coach
- Sandy Bull (1941–2001), American folk musician
- Schak Bull (1858–1956), Norwegian architect
- Scott Bull (born 1953), American professional football player
- Silke Bull, East German sprint canoer
- Stephen Bull (1904–1942), English lawyer and baronet
- Steve Bull (born 1965), English footballer
- Storm Bull (1913–2007), American musician, composer and educator
- Sverre Hagerup Bull (1892–1976), Norwegian banker, composer and writer
- Tas Bull (1932–2003), Australian trade union leader
- Theodor Bull (1870–1958), Norwegian businessperson and genealogist
- Thomas Bull (Pennsylvania politician) (1744–1837), American politician from Pennsylvania
- Thomas K. Bull (died 1893), American politician from Pennsylvania
- Thomas Short Bull (born 1946), American politician frrom South Dakota
- Tom Bull (1905–1976), Australian politician
- Tove Bull (born 1945), Norwegian linguist
- Trygve Bull (1905–1999), Norwegian lecturer and politician
- Vika Bull and Linda Bull, Australian vocal duo performing as Vika and Linda
- Walter Bull (died 1952), English football player and manager
- William Bull, several specific people
- William Bull (landowner) (1867–1956), early Australian landowner in the Riverina region, Australia
- William Frederick Bull, Canadian diplomat
- William James Bull (1863–1931), 1st Baronet, British solicitor, Conservative politician, Member of Parliament
People bearing Bull as part of a traditional Native-American name
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- Sitting Bull (c. 1831 – 1890), Hunkpapa Sioux leader and performer
- Amos Bad Heart Bull (c. 1868 – 1913), Oglala Lakota artist and historian
- Grant Short Bull (c. 1851 – 1935), Oglala Lakota leader (he started being known, as an adult, with "Grant" before his traditional name, and passed "Short Bull" on in surname fashion in the male line of his descendants)
- Arnold Short Bull (c. 1845 – 1923), Sičháŋǧu (or Brulé) Lakota leader
- White Bull (Native American) (1849–1947), Sioux leader