George Ames Plimpton (March 18, 1927 – September 25, 2003) was an American writer. He is known for his sports writing and for helping to found The Paris Review, as well as his patrician demeanor and accent. He was known for "participatory journalism," including accounts of his active involvement in professional sporting events, acting in a Western, performing a comedy act at Caesars Palace in Las Vegas, and playing with the New York Philharmonic Orchestra and then recording the experience from the point of view of an amateur.

According to The New York Times, his "exploits in editing and writing seesawed between belles lettres and the witty accounts he wrote of his various madcap attempts to slip into other people's high-profile careers ... a lanky, urbane man possessed of boundless energy and perpetual bonhomie, became, in 1953, the first and only editor of The Paris Review. A ubiquitous presence at book parties and other gala social events, he was tireless in his commitment to the serious, contemporary fiction the magazine publishes ... All of this contributed to the charm of reading about Mr. Plimpton's frequently hapless adventures as 'professional' athlete, stand-up comedian, movie bad guy or circus performer; which he chronicled in witty, elegant prose in nearly three dozen books."

Plimpton was born in New York City on March 18, 1927, and spent his childhood there, attending St. Bernard's School and growing up in an apartment duplex on Manhattan's Upper East Side located at 1165 Fifth Avenue. During the summers, he lived in the hamlet of West Hills, Huntington, Suffolk County on Long Island.

He was the son of Francis T. P. Plimpton and the grandson of Frances Taylor Pearsons and George Arthur Plimpton. His father was a successful corporate lawyer and name partner of the law firm Debevoise and Plimpton; he was appointed by President John F. Kennedy as U.S. deputy ambassador to the United Nations, serving from 1961 to 1965.

His mother was Pauline Ames, the daughter of botanist Oakes Ames (1874–1950) and artist Blanche Ames. Both of Plimpton's maternal grandparents were born with the surname Ames; his mother was the granddaughter of Medal of Honor recipient Adelbert Ames (1835–1933), an American sailor, soldier, and politician, and Oliver Ames, a US political figure and the 35th Governor of Massachusetts (1887–1890). She was also the great-granddaughter on her father's side of Oakes Ames (1804–1873), an industrialist and congressman who was implicated in the Crédit Mobilier railroad scandal of 1872; and Governor-General of New Orleans Benjamin Franklin Butler, an American lawyer and politician who represented Massachusetts in the United States House of Representatives and later served as the 33rd Governor of Massachusetts.

Plimpton's son described him as a White Anglo-Saxon Protestant and wrote that both of Plimpton's parents were descended from Mayflower passengers.

George had three siblings: Francis Taylor Pearsons Plimpton Jr., Oakes Ames Plimpton, and Sarah Gay Plimpton.

After St. Bernard's School, Plimpton attended Phillips Exeter Academy (from which he was expelled just shy of graduation), and Daytona Beach High School, where he received his high school diploma, before entering Harvard College in July 1944. He wrote for the Harvard Lampoon, was a member of the Hasty Pudding Club, Pi Eta, the Signet Society, and the Porcellian Club and majored in English. Plimpton entered Harvard as a member of the Class of 1948, but did not graduate until 1950 due to intervening military service. He was also an accomplished birdwatcher.^{[citation needed]}