27 public K-12 schools in Costa Mesa from NCES Common Core of Data: enrollment, grade span, demographics, and Civil Rights Data Collection statistics for every active campus.
27 public schools ranked by quality score. NCES CCD 2024-25 data.
The highest-ranked of Costa Mesa's 27 public schools is Costa Mesa High, scoring 26/100, against a city average of 39.5/100. Computed live across every Costa Mesa campus reporting to NCES.
How the Costa Mesa Public-School Landscape Breaks Down
Costa Mesa, CA enrolls 11,898 students across 27 public schools reporting to the National Center for Education Statistics. Of those, 3 are charter schools, giving families genuine alternatives to the traditional neighbourhood assignment model. The average student-teacher ratio across the city is 16.9:1, and the composite quality score, derived from student-teacher ratio, counselor access, gifted-program availability, and CRDC attendance data, averages 39.5/100. 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 Costa Mesa on this index is Costa Mesa High, at 26/100 on the Resource Investment Index with 1,730 enrolled students. What the index does and doesn't measure; click any school below for its full component breakdown.
Costa Mesa spans 5 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.
Costa Mesa school enrollment varies 1730× across entities
Costa Mesa school enrollment ranges from 1 students (lowest) to 1,730 students (highest), a spread of 1,729 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.
Costa Mesa has higher-than-average Title I eligibility — 59.9% of the population qualifies for free or reduced-price lunch
free or reduced-price lunch eligibility is the federal threshold for Title I funding allocations, established under the Every Student Succeeds Act (ESSA, 2015). Areas above 75% eligibility receive concentration grants on top of the basic Title I formula. Regions with eligibility this high typically draw a substantially larger federal funding share relative to their local tax base, which can either offset or reinforce existing gaps depending on allocation policy.
Costa Mesa operates 5 school districts — among the most fragmented governance structures in the country
Each school district has independent budgeting, hiring, and service delivery authority. The fragmentation reflects historical patterns of inter-municipal boundary lines that pre-date modern city growth, students in different parts of the same city can attend different districts with different per-pupil spending, calendars, and graduation requirements. Per-region variation is largest in fragmented systems because each school district sets its own budget, contracts, and priorities without higher-level coordination above the regulatory floor.
Costa Mesa student-teacher ratio is 16.9:1 — near the typical range (US average ~15.7) — aligned with the U.S. average of approximately 15.7:1
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 Variation between sub-units within Costa Mesa is typically wider than the Costa Mesa-aggregate figure suggests.
Costa Mesa has higher-than-average charter school authorisation eligibility — 11.1% of the population qualifies for charter-school enrollment options
charter-school enrollment options eligibility is the federal threshold for charter school authorisation funding allocations, established under the state-specific charter law. Areas above 30% eligibility receive concentration grants on top of the basic charter school authorisation formula. Regions with eligibility this high typically draw a substantially larger federal funding share relative to their local tax base, which can either offset or reinforce existing gaps depending on allocation policy.
Most racially and ethnically mixed schools in Costa Mesa
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 Costa Mesa is Costa Mesa High with a quality score of 26/100. There are 27 public schools in Costa Mesa with 11,898 total students.
How many schools are in Costa Mesa, CA? ▼
Costa Mesa has 27 public schools with a total enrollment of 11,898 students. 3 are charter schools. Average student-teacher ratio: 16.9:1.
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.
