Vincent Walker Foster Jr. (January 15, 1945 – July 20, 1993) was an American attorney who served as deputy White House counsel during the first six months of the Clinton administration.

Foster had been a partner at Rose Law Firm in Little Rock, Arkansas, where, as The Washington Post later wrote, he rose to "the pinnacle of the Arkansas legal establishment." At the White House, he was unhappy with work in politics and spiraled into depression, and in July 1993, he was found dead of a gunshot wound in Fort Marcy Park. Five official governmental investigations ruled his death a suicide, but several conspiracy theories emerged.

Foster was born in Hope, Arkansas, to Vincent W. Foster Sr. and Alice Mae Foster (1914–2012). His father became a successful real estate developer. Vincent had two sisters, Sheila and Sharon.

Vincent was a childhood friend of Bill Clinton, then known as Billy Blythe. Clinton, a year and a half younger than Foster, resided in an adjoining property to Foster's with his grandparents while his mother was often away studying nursing. Clinton later recalled, "I lived with my grandparents in a modest little house across from Vince Foster's nice, big, white brick house." Another Clinton recollection was that Foster "was kind to me and never lorded it over me the way so many older boys did with younger ones." Another childhood friend was Mack McLarty, who would one day become White House Chief of Staff for Clinton. In 1950, Clinton's mother remarried and they relocated to a different part of Hope. By several accounts, Foster and Clinton attended Miss Marie Purkins' School for Little Folks together, a private kindergarten, although Foster was a year ahead in school. Then, around late 1952, the Clintons moved away to Hot Springs. However, Clinton would often return to visit his grandparents in Hope during summers, weekends, and holidays and he maintained connections with the people there.

Foster excelled as a student and athlete. At Hope High School, he became president of the student council, with McLarty serving as vice president. He graduated from Hope High School in 1963.

Foster attended Davidson College, graduating with a bachelor's degree in psychology in 1967. His father wanted him to join the family real estate business, but instead, he opted to attend law school.

After starting at Vanderbilt University Law School, he joined the Arkansas National Guard during the height of the Vietnam War to avoid the military draft. To be closer to his guard responsibilities, he transferred to the University of Arkansas School of Law in Fayetteville, Arkansas, where he was managing editor of the law review. He received his Juris Doctor in 1971, graduating first in his class. He scored the highest in his class on the Arkansas bar exam.

Foster met Elizabeth Braden, known as Lisa, during his sophomore year at Davidson; she was the daughter of an insurance broker from Nashville and was attending Sweet Briar College. They married on April 20, 1968, at St. Henry Catholic Church in Nashville. They had three children: Vincent III, Laura, and John.