In academia

• Clyde Summers (1918–2010), American labor lawyer and law professor at the University of Pennsylvania Law School
• David Summers (art historian), American art historian
• Harry G. Summers, Jr. (1932–1999), American army Colonel and author about the Vietnam War
• Lawrence Summers (born 1954), American economist and former president of Harvard University
• Max D. Summers (born 1939), American molecular biologist
• Robert Summers (economist) (1922–2012), American economist
• Robert S. Summers (1933–2019), American academic
• Vera Summers (1899-?), Australian high school teacher and principal

In arts and entertainment

In government and politics

• Amy Summers (born 1963), American state representative from West Virginia
• David Summers (diplomat), Canadian High Commissioner to Malaysia
• George W. Summers (1804–1868), American politician
• Glenn E. Summers (1925–2020), American lawyer, judge, and politician
• Henry Summers (civil servant)
• John W. Summers (1870–1937), American politician
• John Summers (Tennessee politician) from Metropolitan Council

In sport

• Bill Summers (umpire) (1895–1966), American umpire
• Champ Summers (1946–2012), American baseball player
• DaJuan Summers (born 1988), American Basketball Player
• Ed Summers (1884–1953), American baseball player
• Freddie Summers (born 1947), American football player
• Jamar Summers (born 1995), American football player
• John Summers (figure skater) (born 1957), American ice dancer
• John Summers (footballer) (1915–1991), English footballer
• John Summers (sport shooter), Australian Olympic sport shooter
• John Summers (curler) in the 2011 World Senior Curling Championships – Men's tournament
• Johnny Summers (footballer) (1927–1962), footballer for Charlton Athletic
• Johnny Summers (boxer) (1882–1946), English boxer
• Richard Summers (1860–1941), Wales rugby union international
• Sheila Piercey Summers (1919–2005), South African tennis player
• Ty Summers (born 1996), American football player

In other fields

• Bill Summers (car builder) (1935–2011), American car builder and longtime speed record holder
• Bill Summers (jeweller), predecessor of David V. Thomas as British crown jeweller
• Obediah Summers (1844–1896), African American minister, Civil War veteran, chaplain
• John Summers & Sons, UK steel and iron producers
• John Summers (RAF officer) (1894–?), World War I flying ace
• Joseph Summers (1904–1954), British test pilot
• Montague Summers (1880–1948), English author and clergyman
• Sarah Rose Summers (born 1994), American beauty pageant titleholder and Miss USA 2018
• Vera Summers (born 1899), Australian high school teacher and principal

Buffy the Vampire Slayer

• Buffy Summers, central character of the film and television series, Buffy the Vampire Slayer
• Dawn Summers, Buffy's sister
• Hank Summers, father of Buffy and Dawn Summers
• Joyce Summers, mother of Buffy and Dawn Summers

Marvel Comics

• Alex Summers, Havok of the X-Men
• Christopher Summers, Corsair, father of Scott, Alex and Gabriel Summers, former leader of the Starjammers
• Gabriel Summers, Vulcan, X-Man turned supervillain
• Hope Summers (character), first mutant born after M-Day
• Jean Grey-Summers, Phoenix of the X-Men
• Nathan Summers, Cable of the X-Men
• Rachel Summers, Marvel Girl of the X-Men and Excalibur
• Ruby Summers, daughter of Scott Summers and Emma Frost
• Scott Summers, Cyclops, leader of the X-Men