The district serves San Marcos, as well as sections of Vista, Escondido, Carlsbad, and some unincorporated areas of the county.

SMUSD is the fifth largest school district in San Diego County, serving over 19,000 students.

[3] The five current board members include Heidi Herrick, Sarah Ahmad, Andrés Martín, Lena Meum, and Stacy Carlson.

[5] Educational Services Tiffany Campbell is deputy superintendent of schools.

Steve Baum, executive director of educational services, leads the department.