Academics •
Alison Mercer (born 1954), New Zealand zoologist •
Asa Mercer, first president of the Territorial University of Washington and a member of the Washington State Senate •
James Mercer (mathematician), English mathematician •
Roger Mercer, British archaeologist
Actors, performers, presenters and producers •
Beryl Mercer, Spanish-born British actress •
Bill Mercer, American sportscaster •
Jack Mercer, American animator and voice actor •
Marian Mercer, award-winning American actress •
Matthew Mercer, American voice actor •
Phil Mercer, radio presenter on the BBC •
Rick Mercer, Canadian comedian, television personality and political satirist •
Sam Mercer, film producer •
William (Rosko) Mercer (1927–2000), known as Rosko, American news announcer and disc jockey
Athletes and sports personalities •
Alex Mercer (footballer), Scottish footballer •
Arthur Mercer (1902–1994), English footballer •
Dawson Mercer (born 2001), Canadian ice hockey player •
Gary Mercer, New Zealand rugby league footballer and coach •
Joe Mercer, English football player and manager •
Joe Mercer (jockey), English jockey •
LaVon Mercer (born 1959), American-Israeli basketball player •
Leroy Mercer, American football player •
Mike Mercer (basketball), American basketball player •
Mike Mercer (American football), former American college and professional football player •
Ray Mercer, American professional boxer, former WBO World Heavyweight Champion, Olympic gold medalist •
Ron Mercer, American former basketball player at the University of Kentucky, in the National Basketball Association •
Tommy Mercer, American professional wrestler •
Win Mercer, pitcher in Major League Baseball from 1894 to 1902
Literary figures •
Cecil William Mercer (1885–1960), British novelist who wrote under the pseudonym of Dornford Yates •
David Mercer (playwright), English playwright and dramatist •
Harold Mercer (1882–1952), Australian poet and short story writer •
Jeremy Mercer, Canadian writer •
Mick Mercer, journalist and author •
William Mercer (poet) (c. 1605 – c. 1675), Scottish poet and army officer
Musicians •
Carey Mercer, Canadian indie singer-songwriter •
James Mercer (musician), guitarist, lead singer and songwriter of the Shins •
Jerry Mercer, former drummer for the Canadian rock groups April Wine and Mashmakhan •
Johnny Mercer, American songwriter and singer •
Mabel Mercer, English-born cabaret singer •
Vic Mercer, better known as "Celph Titled", American rapper
Politicians and civil servants •
Bob Mercer (politician), Canadian politician •
Charles F. Mercer, nineteenth-century U.S. politician from Virginia •
David Henry Mercer, Nebraska Republican politician •
James Mercer, soldier, jurist, Virginia delegate to the
Second Continental Congress •
John Francis Mercer, American lawyer, planter, and politician from Virginia and Maryland •
Johnny Mercer, British politician (Minister for Veterans 2019–2021), former army officer •
Patrick Mercer, British politician, military novelist, former army officer •
William Thomas Mercer (1821–1879), British Colonial Secretary in Hong Kong, 1859–1868 •
William W. Mercer, United States Attorney for the District of Montana
Soldiers • General
Cavalié Mercer, British artillery officer and author of
Journal of the Waterloo Campaign •
Hugh Mercer, physician, brigadier general in the Continental Army and a close friend to George Washington •
Hugh W. Mercer, officer in the United States Army and then a Confederate general during the American Civil War •
Malcolm Mercer, Canadian general, barrister and art patron •
Major Mercer of the Worcestershire horse, who played a prominent part on the Parliamentary side at the Battle of Worcester in 1651
Others •
George Mercer, rapist •
Henry Chapman Mercer, Pennsylvania archeologist, tile-maker, and designer of poured-concrete structures such as the Mercer Museum •
Henry Mercer (priest), Anglican clergyman and fraudster •
Lucy Mercer best known for her affair with
Franklin Delano Roosevelt •
John Mercer (disambiguation) •
Mark Mercer (preservationist) (died 2019) •
Nelson Samuel Mercer (1874–1963), physician •
Rebekah Mercer, head of
Mercer Family Foundation; daughter of
Robert Mercer; •
Robert Mercer (businessman) (born 1946), computer scientist and former co-CEO of Renaissance Technologies •
Robert Mercer (priest) (born 1935), English priest •
Ruth Sienkiewicz-Mercer, quadriplegic and American disability rights activist •
Sam Mercer (preservationist) (1920–2013) •
Samuel David Mercer (1841–1907), physician •
Sidney Agnew Mercer, English watercolourist for whom the Mercer Art Gallery, Harrogate, England, is named ==Fictional characters==