(Las) Tres Marias ("The Three Marys") may refer to:

Três Marias, a municipality in Minas Gerais, Brazil Las Tres Marías (group), an Afro-Ecuadorian musical trio Islas Marías, Mexico Orion's Belt, in the Orion constellation Three 1990s telenovelas starring Thalía: Maria Mercedes, Marimar, and María la del Barrio