The Cupertino Union School District (abbreviated as CUSD) is a school district in Santa Clara County, California.

CUSD's jurisdiction covers the communities of Cupertino, San Jose, Sunnyvale, Santa Clara, Saratoga, and Los Altos.

CUSD operates seventeen elementary schools (K-5) and five middle schools (6-8), and one (K-8) school.

It is a feeder for the Fremont Union High School District.

[2] Colloquial names of schools are in bold.