22 public K-12 schools in San Mateo from NCES Common Core of Data: enrollment, grade span, demographics, and Civil Rights Data Collection statistics for every active campus.
22 public schools ranked by quality score. NCES CCD 2024-25 data.
The highest-ranked of San Mateo's 22 public schools is Aragon High, scoring 33/100, against a city average of 37/100. Computed live across every San Mateo campus reporting to NCES.
How the San Mateo Public-School Landscape Breaks Down
San Mateo, CA enrolls 12,088 students across 22 public schools reporting to the National Center for Education Statistics. The average student-teacher ratio across the city is 18.4:1, and the composite quality score, derived from student-teacher ratio, counselor access, gifted-program availability, and CRDC attendance data, averages 37/100. Schools must report at least five campuses in a city to appear in this listing, which is why very small towns may redirect to the broader county or state view.
The most-resourced campus in San Mateo on this index is Aragon High, at 33/100 on the Resource Investment Index with 1,658 enrolled students. What the index does and doesn't measure; click any school below for its full component breakdown.
San Mateo spans 3 districts, each filing its own NCES F-33 return, per-pupil spending can vary between neighbouring campuses. Sort the table below by enrollment, level, or district; click any school for its full profile.
San Mateo school enrollment varies 237× across entities
San Mateo school enrollment ranges from 7 students (lowest) to 1,658 students (highest), a spread of 1,651 students. That ratio is an extreme outlier spread — among the widest gaps observed anywhere in this dataset. Per-school staffing, programme depth, and capital-renovation cycles often diverge inside the same city based on enrollment shape, a 200-student magnet runs a different operational model than a 2,000-student comprehensive high school.
San Mateo student-teacher ratio is 18.4:1 — high (typically associated with larger urban scale or staffing constraints that have widened the headcount gap)
student-teacher ratio is the simplest comparative metric but it does not capture the full picture: the ratio counts FTE classroom teachers against total enrollment, push-in specialists, English-language aides, special-education co-teachers, and counselors are not included in most reporting Higher values may reflect larger urban scale or recent resource constraints that have widened the gap.
Most racially and ethnically mixed schools in San Mateo
Ranked by the Simpson student-body diversity index (0-100) from NCES race and ethnicity data, where higher means a more evenly mixed student body. It measures mix, not quality.
The highest-ranked school in San Mateo is Aragon High with a quality score of 33/100. There are 22 public schools in San Mateo with 12,088 total students.
How many schools are in San Mateo, CA? ▼
San Mateo has 22 public schools with a total enrollment of 12,088 students. Average student-teacher ratio: 18.4:1.
Data from NCES Common Core of Data (CCD) 2024-25 and Civil Rights Data Collection (CRDC) 2021-22. Quality scores based on student-teacher ratio,
counselor access, gifted programs, and attendance. Schools must have 5+ in the city to be listed.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the NCES Common Core of Data (CCD). Consult a qualified professional before making decisions based on this data.
Read our methodology, which explains how this data is sourced, computed, and verified.
