Muniz or Muñiz is a surname, primarily in the Spanish language, where it is spelled Muñiz (Muniz is an American or Portuguese variant). It may refer to:
Carlos Muñiz (born 1981), American baseball player
Frankie Muniz (born 1985), American actor João Muniz (born 2005), Portuguese footballer Júlio César de Paula Muniz Júnior (born 1988), Brazilian football player Manny Muñiz (born 1947), Puerto Rican baseball player Marco Antonio Muñiz (born 1933), Mexican singer Marc Anthony (born 1968), Puerto Rican singer (born Marco Antonio Muñiz) Rafo Muñiz (born 1956), Puerto Rican actor, director, & producer Suzane Louise Magnani Muniz (born 1983), Brazilian murderer Tomás Muñiz (1900–1963), Puerto Rican radio and television producer Tommy Muñiz (1922–2009), Puerto Rican comedian Vik Muniz (born 1961), Brazilian avant-garde artist
See also Moniz Muñoz