Every public school, district, and the headline NCES measures for California - 1,986 districts, drawn straight from federal records.
Compiled by PlainSchools, Education-data publisher
Scored 0-100 from federal NCES and CRDC indicators, resource allocation, not test scores - the same index shown on every school page, averaged across 9,998 scored California schools. Full methodology →
The state in one line
California runs 10,006 public schools across 1,986 districts, with a 21.5:1 average classroom and 55.5% of students on subsidized lunch.
10,006
public schools
1,986
school districts
21.5:1
avg student–teacher
55.5%
free/reduced lunch
How California ranks nationally
Per-pupil spending
$18,665
#20of 51 · highest-spending
Average student-teacher ratio
21.5:1
#51of 51 · lowest ratios
Public schools
10,006
#1of 51 · most schools
On subsidized lunch
55.5%
#16of 43 · highest share
California ranks #20 of 51 nationally on per-pupil spending and #51 of 51 on average student-teacher ratio, derived live by comparing it against every other state. Ranked among all 50 states + DC from NCES enrollment/staffing and the F-33 finance survey. Lunch share is an indicator of student need, not of quality.
What the NCES Data Says About California Schools
California operates 10,006 public K-12 schools organised into 1,986 independent school districts serving 5,787,663 students, per the National Center for Education Statistics Common Core of Data 2024-25. The largest district, Los Angeles Unified, enrolls 427,795 pupils across 785 schools at $22,606 per student, while smaller rural districts can run fewer than a dozen campuses. This fragmentation, inherited from century-old township governance patterns in many states, is why per-pupil spending, class sizes, and programme availability vary dramatically inside a single state boundary.
Statewide, the average student-teacher ratio is 21.5:1, a useful benchmark for comparing any individual district or school on PlainSchools. Free-lunch eligibility averages 55.5% across California public schools, a federal indicator of economic need that drives Title I funding allocations. The district table below is sortable by enrollment, school count, and per-pupil expenditure, the three fields that best predict a district's financial and demographic profile. For schools specifically, use the rankings links above to view per-category leaderboards covering spending, student-teacher ratio, best schools by composite quality score, chronic absenteeism, and funding-equity distribution within the state.
Every district figure here pulls from two distinct federal surveys: enrollment and demographic data come from the NCES Common Core of Data 2024-25 (school membership and directory), while per-pupil spending, teacher salaries, and federal/state/local revenue shares originate in the NCES F-33 School District Finance Survey (FY 2022-23). Civil-rights indicators, gifted enrollment, AP course counts, counselor staffing, chronic absenteeism, in- and out-of-school suspensions, come from the 2021-22 Civil Rights Data Collection. Cross-referencing these three sources is what lets PlainSchools produce composite scores and equity rankings that single-source tools cannot.
California's average student-teacher ratio vs. every US state
Average students per teacher, state by state (lower means more staffing per student)
22lower student-teacher ratio than 0% of 51 US states
Each bar is a band; taller bars hold more US states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Department of Education, NCES Common Core of Data · 2024-25
Federal data, transparent formula.
PlainSchools publishes the actual federal survey data - enrollment, staffing, finance, and demographics from NCES. The diversity index and composite quality scores referenced on this page are PlainSchools' own transparent derived indices (not an official NCES rating), computed directly from those datasets with the exact formula disclosed on our methodology page; every input number traces to a cited source. These figures describe reported resource allocation across a large, varied state - a starting point for comparing districts and schools, not a substitute for reviewing a specific school's own record.
California per-pupil spending varies 11.6× across districts
Per-pupil spending in California ranges from $7,727 (lowest district) to $89,771 (highest), a spread of $82,044. That ratio is among the widest in the country and predicts large gaps in class size, programme availability, and counselor:student ratios that compound across a 12-year K-12 career. High-spending districts typically draw on higher property tax bases, a structural feature of state education finance under the federal Title I framework that sets the floor but not the ceiling.
California has higher-than-average Title I eligibility - 55.5% of students qualify for free or reduced-price lunch
Free-lunch eligibility is the federal threshold for Title I funding allocations under the Every Student Succeeds Act (ESSA, 2015), which replaced No Child Left Behind in defining how the federal government distributes K-12 supplemental funding. Districts above 75% eligibility receive concentration grants on top of the basic Title I formula. States with majority eligibility typically draw a substantially larger federal funding share relative to their local property tax base, which can either offset spending gaps or reinforce them depending on state allocation policy.
California operates 1,986 school districts, among the most fragmented K-12 governance structures in the country
Each district has independent budgeting, hiring, and curriculum authority. The fragmentation predates modern county-level consolidation efforts and reflects 19th-century township governance patterns, a feature of states that organised public schooling around small civic units rather than centralised state systems. Per-pupil spending and accountability variations are largest in fragmented states because each district sets its own tax rate, contracts, and programme mix without state-level coordination above the regulatory floor.
Average California student-teacher ratio is 21.5:1 - high (typically associated with larger urban systems or staffing constraints)
Student-teacher ratio is the simplest staffing metric reported on NCES Common Core of Data, but it does not capture push-in specialists, intervention staff, English Language Learner aides, special education co-teachers, or counseling and support staff. Higher ratios in this state may reflect urban district scale where one school enrolls thousands of students, or recent staffing shortages that have widened the headcount gap. Class-load comparisons are most meaningful at the district or school level, not the state aggregate.
California's public schools average a Simpson diversity index of 46.0/100, above the national average of 43.5. The index runs 0-100 from NCES race and ethnicity data, where higher means a more evenly mixed student body. It measures mix, not quality. See where California ranks in our national school-diversity analysis.
Data sourced from NCES Common Core of Data (CCD) 2024-25, NCES F-33 School District Finance Survey, and Civil Rights Data Collection (CRDC) 2021-22.
Using the California data
California's 10,006 schools sit inside 1,986 districts - compare at the district level first.
District boundaries decide enrollment: shortlist 2-3 districts on spending, ratio, and size before comparing individual schools. Compare districts →
Check how California distributes money across its districts, funding equity varies more within states than between them. Funding equity →
Verify any school's federal record (enrollment, staffing, CRDC flags) before a visit or enrollment decision. Look up a school →
Figures are the federal record (CCD 2024-25, F-33 FY 2022-23, CRDC 2021-22) - they lag the current school year. PlainSchools assigns no subjective rating; the composite quality score used in our rankings is a transparent, reproducible index computed from this cited federal data.
Frequently Asked Questions
How many public schools are in California?
California has 10,006 public schools across 1986 school districts, serving 5,787,663 students.
What is the average student-teacher ratio in California?
The average student-teacher ratio in California public schools is 21.5:1. This varies by district, use the district table below to compare.
What percentage of California students qualify for free lunch?
55.5% of students in California qualify for free or reduced-price lunch, an indicator of economic need used for Title I funding.
What is the largest school district in California?
The largest school district in California is Los Angeles Unified with 427,795 students across 785 schools.
Why does per-pupil spending vary so much across California districts?
California districts spend between $7,727 and $89,771 per pupil, a 11.6× range. This is a wide spread, well above the typical U.S. state range. Most U.S. states fund schools through a mix of state aid (typically 40-60%), local property tax (30-50%), and federal Title I (5-15%); districts in higher property-value areas raise more per pupil from local taxes, while state aid rarely closes the full gap. The federal F-33 finance survey reports actual current expenditures including instructional and support services.
Largest K-12 public schools by total students enrolled
students
Highlands Community Ch…
11,713
Highlands Community Charter
11,713 students
100.0% of the leader · rank #1 · Sacramento, CA
River Springs Charter
7,703
River Springs Charter
7,703 students
65.8% of the leader · rank #2 · Temecula, CA
Blue Ridge Academy
7,657
Blue Ridge Academy
7,657 students
65.4% of the leader · rank #3 · Maricopa, CA
Visions in Education
7,460
Visions in Education
7,460 students
63.7% of the leader · rank #4 · Carmichael, CA
Pacific Coast Academy
6,760
Pacific Coast Academy
6,760 students
57.7% of the leader · rank #5 · Poway, CA
Mission Vista Academy
6,724
Mission Vista Academy
6,724 students
57.4% of the leader · rank #6 · Beaumont, CA
Heartland Charter
5,970
Heartland Charter
5,970 students
51.0% of the leader · rank #7 · Maricopa, CA
Granada Hills Charter
5,927
Granada Hills Charter
5,927 students
50.6% of the leader · rank #8 · Granada Hills, CA
What this shows The largest public schools in California by enrollment, often statewide virtual academies or large consolidated campuses, so size here reflects reach, not quality.
Source: National Center for Education Statistics (NCES) Common Core of Data (CCD) - Public school universe · 2023-2024 Public K-12 school enrollment, demographics, and operational data; collected annually by NCES from state education agencies.