Marc Nelson (born Philadelphia, Pennsylvania) is an American singer. His mother was Phyllis Nelson, known for the songs I Like You and Move Closer. He was a member of Boyz II Men while still attending Philadelphia's High School of Performing Arts. However, Nelson left the group before they released their first album to pursue his own solo career. Nelson is a member of the Church of Scientology.

After signing a solo deal with Capitol Records, Marc Nelson scored a hit with a cover of Marvin Gaye's I Want You, which hit #26 on the R&B charts. His follow-up, Count On Me, reached #48 on the R&B charts. Nelson released his solo album, I Want You. in 1991.