Marsai Martin
- Birth Date
- 8/14/2004
- Birth Place
- Plano, Texas, U.S.
- Known For
- Acting

Marsai Martin (born August 14, 2004) is an American child actress and singer. She is known for her role as Diane Johnson in the ABC comedy series Black-ish. She is set to star and executive-produce the Universal Pictures comedy film Little, based on her idea.






