Marion is a name that can be used for both boys and girls.

As a girl's name, it is a shortened form of Marie, a French name that English speakers have used since the Middle Ages. It was sometimes used as a variation of the names Margaret or Margery.

As a boy's name, it comes from the Latin name Marianus, which is a variation of the name Marius.

Women

• Marion Adams-Acton (1846–1928), Scottish novelist
• Marion Adnams (1898–1995), English painter, printmaker, and artist
• Marion Aizpors (born 1961), German swimmer
• Marion Allemoz (born 1989), French ice hockey player
• Marion Angus (1865–1946), Scottish poet
• Marion Arnott, Scottish author
• Marion Aunor (born 1992), Filipino singer-songwriter
• Marion Aye (1903–1951), American actress
• Marion Bailey (born 1951), British actress
• Marion Barter (born 1945), Australian teacher who has been missing since 1997
• Marion Bartoli (born 1984), French tennis player
• Marion Bauer (1882–1955), American composer, teacher, writer, and music critic
• Marion Babcock Baxter (1850–1910), American lecturer, author, and financial agent
• Marion Hall Best (1905–1988), Australian interior designer
• Marion Zimmer Bradley (1930–1999), American author
• Marion Howard Brazier (1850–1935), American journalist, editor, lecturer, and clubwoman
• Marion Bryce (1839–1920), Scottish-born Canadian educator and community leader
• Marion Corbett, pen name of the Misses Corbett
• Marion Cotillard (born 1975), French actress
• Marion Cunningham (author) (1922–2012), American cookbook author
• Marion Davies (1897–1961), American actress and partner of William Randolph Hearst
• Marion Dönhoff (1909–2002), German journalist and publisher
• Marion Donovan (1917–1998), American inventor and entrepreneur
• Marion Davison Duffie (1896–1965), American singer and voice teacher
• Marion Moncure Duncan (1913–1978), American businesswoman and 25th president general of the NSDAR
• Marion du Faouët (1717–1755), Breton bandit leader
• Marion Frater, New Zealand judge
• Marion Goldman (born 1945), American sociologist
• Marion Cameron Gray (1902–1979), Scottish mathematician
• Marion Hall (born 1972), Jamaican musician
• Marion Jones (born 1975), American sprinter
• Marion Jones Farquhar (1879–1965), née Jones, American tennis player
• Marion Kent (died 1500), English businessperson and property manager
• Marion Kracht (born 1962), German actress
• Marion Laboure, French economist, macro strategist, and lecturer
• Marion Lüttge (born 1941), former East German javelin thrower
• Marion Mackenzie (born 1873), British medical doctor and suffragette
• Marion Mann (singer) (1914–2004), American singer
• Marion Maréchal (born 1989), French politician
• Marion Marlowe (1929–2012), American singer and actress
• Marion Oberhofer (born 2000), Italian luger
• Marion Raven (born 1984), Norwegian singer and songwriter
• Marion Ross (born 1928), American actress
• Marion Ross (physicist) (1903–1994), Scottish physicist
• Marion Rothman (1928–2023), American film editor
• Marion Scott (1877–1953), English violinist, musicologist, writer, music critic, editor, composer, and poet
• Marion Margery Scranton (1884–1960), American suffragist and Republican activist
• Marion Scrymgour (born 1960), Australian politician
• Marion Shilling (1910–2004), American actress
• Marion Shimmin (1879–1942), Manx politician
• Marion Short (c. 1880 – ?), American dramatist
• Marion Simon Misch (1869–1941), American activist, teacher, writer, and businesswoman
• Marion Stokes (1929–2012), American activist and archivist
• Marion Thees (born 1984), German retired skeleton racer
• Marion True (born 1948), American archaeologist
• Marion Tuu'luq (1910–2002), Canadian Inuk artist
• Marion Tylee (1906–1969), New Zealand artist
• Marion Verbruggen (born 1950), Dutch recorder player and teacher
• Marion Wagner (born 1978), German retired sprinter
• Marion Walsmann (born 1963), German politician and Member of the European Parliament
• Marion Ballantyne White (1871–1958), American mathematician and university professor
• Marion Wiesel (born Mary Renate Erster; 1931–2025), Austrian-American Holocaust survivor, humanitarian, and translator
• Marion Yorck von Wartenburg (1904–2007), German activist and judge

Men

• Marion Barber Jr. (born in 1959), former National Football League player from the United States
• Marion Barber III (1983–2022), former National Football League player from the United States, son of Marion Barber Jr.
• Marion Barry (1936–2014), former mayor of Washington, D.C.
• Marion M. Bradford (1946–2021), American scientist known for developing a method to measure protein levels
• Marion Broadstone (1906–1972), National Football League player from the United States
• Marion Butts (born in 1966), National Football League player from the United States
• Marion Cox (1920–1996), owner of NASCAR race cars
• Marion Knight Jr. (born in 1965), birth name of Suge Knight, founder of Death Row Records
• Marion Mann (1920–2022), American doctor and specialist in disease study
• Marion Morrison (1907–1979), birth name of John Wayne, American film actor
• Marion Motley (1920–1999), National Football League and All-America Football Conference player from the United States, member of the Pro Football Hall of Fame
• Marion Parsonnet (1905–1960), American writer for films
• Marion Albert Pruett (1949–1999), American individual responsible for multiple crimes in a short period
• Marion Pugh (1919–1976), National Football League player from the United States
• Marion Pat Robertson (1930–2023), American religious television broadcaster
• Marion Mike Rounds (born in 1954), U.S. Senator from South Dakota and former Governor of South Dakota
• Marion Silva Fernandes (born in 1991), Brazilian soccer player known as "Marion"
• Marion Spielmann (1858–1948), English journalist and art critic
• Marion Zioncheck (1900–1936), American politician

Fictional characters

• Marion (or Marian), a common name for the shepherdess character in the pastourelle genre of Old French lyric poetry
• Marion, a character in the video game Gunbird
• Marion, Harriet's rival in the book Harriet the Spy by Louise Fitzhugh
• Marion, a human-like train shovel character in the British preschool TV series Thomas & Friends
• Marion Chambers, a character in the movie Halloween
• Lieutenant Marion "Cobra" Cobretti, a character in the movie Cobra, played by Sylvester Stallone
• Marion Cunningham, a character on the TV show Happy Days
• Marion Crane, the female lead in the movie Psycho, played by Janet Leigh
• Marion Dunby, a chief police officer in the video game Lego City Undercover and its prequel, Lego City Undercover: The Chase Begins
• Marion Hill, a former professional football player in the TV series In the House, played by LL Cool J
• Marion Kerby, a character in the movie Topper and its first sequel, played by Constance Bennett
• Marion Moseby, a character played by Phill Lewis in The Suite Life of Zack & Cody and its spin-off, The Suite Life on Deck
• Marion Paroo, a character in The Music Man
• Marion Ravenwood, a character in the Indiana Jones franchise
• Marion St. Claire, a character in Bride Wars
• Marion Stimpleman, a minor character in Boy Meets World
• Marion Tweedy, the maiden name of Molly Bloom in James Joyce's Ulysses
• Marion "Bill" Williamson, a character in the video games Red Dead Redemption and Red Dead Redemption 2