Marie Priscilla Martin Foster (October 24, 1917 – September 6, 2003) was a leader in the Civil Rights Movement in the U.S. during the 1960s and a dental assistant. She was instrumental in helping to register many African-American voters in Selma, Alabama, and was one of the primary local organizers of the Selma to Montgomery marches in 1965. She was called "the mother of the voting rights movement" and was nicknamed Mother Foster.