Who was the first black woman to the US Senate?

In 1967, President Lyndon Johnson nominated Thurgood Marshall as the first African-American Associate Justice on the Supreme Court. He was in office June 13, 1967 - June 28, 1991. He was preceded by Tom C. Clark; and succeeded by Clarence Thomas, a conservative African-American nominated by President George HW Bush.

Marshall, former lead counsel for the NAACP Legal Defense and Education Fund, argued 32 cases before the Supreme Court and won 29. One of his most famous cases was Brown v. Board of Education, (1954).