Dr. Mattie Moss Clark (born Mattie Juliet Moss; March 26, 1925 – September 22, 1994) was an American gospel choir director and the mother of The Clark Sisters, a gospel vocal group. She was the longest-serving International Minister of Music for the Church of God in Christ (COGIC). "Her arrangements, perhaps influenced by her classical training, replaced the unison or two-part textures of earlier gospel music with three-part settings of the music for soprano, alto, and tenor voice ranges—a technique that remained common in gospel choir music for decades afterward."