As a public school, Marshall maintains a unique relationship within the Pasadena Unified School District. The school is a permit-only school that accepts students from a diverse geographical district. The permits are given through a district-run open enrollment process that ensures randomness and fairness. Students attending Marshall Fundamental reside in Altadena, Pasadena, Sierra Madre and unincorporated areas of Los Angeles County. The demand to attend Marshall Fundamental has risen over the past few years, and demand typically exceeds the number of spaces available.