Samuel DeWitt Proctor (July 13, 1921 – May 22, 1997) was an American minister, educator, and humanitarian. An African-American church and higher education leader, he was active in the Civil Rights Movement and is perhaps best known as a mentor and friend of Martin Luther King Jr.

Proctor served as president of Virginia Union University, and North Carolina Agricultural and Technical State University. He also led the Peace Corps in Africa, and served as the senior pastor of Abyssinian Baptist Church in New York City.

Samuel DeWitt Proctor was born in Norfolk, Virginia on July 13, 1921. Unusual for an African American born in this era, Proctor's grandparents on both sides had received education at the university level: his paternal grandmother had attended Hampton Institute, and both of his maternal grandparents had attended Norfolk Mission College, the forerunner of Booker T Washington High School in Norfolk, Virginia. His parents, Herbert Proctor and Velma Hughes met while they were both students at Norfolk Mission College, the only high school for blacks at the time in Norfolk, Virginia. Proctor was raised as a Baptist and as a child attended the congregation that had been founded by his great-grandfather, Zechariah Hughes. Herbert Proctor worked at the Norfolk Naval Shipyard, in Portsmouth, Virginia.

Proctor graduated from Booker T Washington high school in Norfolk, Virginia Class of 1937 and enrolled at Virginia State College, having won a music scholarship to attend. During his time at Virginia State College, he played saxophone in a jazz band, along with famed jazz pianist Billy Taylor where they both pledged Kappa Alpha Psi fraternity. In 1939, he left Virginia State College without taking a degree and enrolled in the U.S. Naval Apprentice School to receive training to become a shipfitter. He abandoned that line of study after a year, and in 1940 matriculated at Virginia Union University. He married his classmate Bessie Tate while he was a student at Virginia Union University in Richmond, Virginia. He graduated with a bachelor's degree in 1942.

He studied at the University of Pennsylvania for one year before enrolling as the only black student at Crozer Theological Seminary in Upland, Pennsylvania in order to pursue a career in the Christian ministry. ^{[citation needed]} Proctor's professors at Crozer had been highly influenced by higher criticism, and learning from them caused Proctor to question the literal truth of the Bible, leading him to question his faith.^{[citation needed]}

While studying at Crozer, Proctor worshiped at the Calvary Baptist Church and became known as one of the "Sons of Calvary" along with Martin Luther King Jr. and William Augustus Jones Jr., all who went on to be well known preachers in the black church. Proctor received a Bachelor of Divinity degree from Crozer in 1945. He enrolled at the Boston University School of Theology and received a doctorate degree there in 1950.

Following graduation, Proctor accepted a call to become pastor of the Pond Street Church in Providence, Rhode Island. At the same time, he accepted the John Price Crozer Fellowship to study ethics at Yale University. Proctor found splitting his time between Providence and New Haven, Connecticut onerous, so after a year, he moved to Boston, enrolling at the Boston University School of Theology. He received a Ph.D. in Theology from Boston University in 1950. In 1950, Proctor was invited to give a lecture at Crozer Theological Seminary, his alma mater, and it was there that he first met and befriended Martin Luther King Jr., who was a student at Crozer at the time. Proctor told King that the works of Reinhold Niebuhr and Harry Emerson Fosdick (especially Fosdick's The Modern Use of the Bible (1924)) had been crucial in helping him reconcile his Christian faith with the brand of liberal Christianity taught at Crozer.

Proctor accepted a position at his other alma mater, Virginia Union University, and there began a meteoric rise from dean to vice-president, before being appointed as president of Virginia Union University in 1955 at the unusually young age of 33. Shortly after his appointment as university president, in December 1955, King invited Proctor to Montgomery, Alabama to speak; in the middle of Montgomery bus boycott, Proctor delivered a "Spring Lecture Series". Proctor was one of several black leaders invited to the White House by U.S. President Dwight D. Eisenhower. In the wake of Brown v. Board of Education, Eisenhower asked these leaders to "ease off" on their demands for civil rights for African Americans. Proctor and the other black leaders politely refused Eisenhower's request. During his time as president of Virginia Union University (1955–60), Proctor traveled extensively abroad for the first time in his life: he lectured in the Soviet Union, toured the Auschwitz concentration camp, attended conferences in Africa and the South Pacific, and visited Africa for the first time.