Every public school, district, and the headline NCES measures for Arizona - 661 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 2,074 scored Arizona schools. Full methodology →
The state in one line
Arizona runs 2,186 public schools across 661 districts, with a 17:1 average classroom and 48.3% of students on subsidized lunch.
2,186
public schools
661
school districts
17:1
avg student–teacher
48.3%
free/reduced lunch
How Arizona ranks nationally
Per-pupil spending
$13,502
#42of 51 · highest-spending
Average student-teacher ratio
17:1
#41of 51 · lowest ratios
Public schools
2,186
#16of 51 · most schools
On subsidized lunch
48.3%
#22of 43 · highest share
Arizona ranks #42 of 51 nationally on per-pupil spending and #41 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 Arizona Schools
Arizona operates 2,186 public K-12 schools organised into 661 independent school districts serving 1,103,092 students, per the National Center for Education Statistics Common Core of Data 2024-25. The largest district, Mesa Unified District (4235), enrolls 58,343 pupils across 78 schools at $12,121 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 17:1, a useful benchmark for comparing any individual district or school on PlainSchools. Free-lunch eligibility averages 48.3% across Arizona 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.
Arizona's average student-teacher ratio vs. every US state
Average students per teacher, state by state (lower means more staffing per student)
17lower student-teacher ratio than 20% 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.
Arizona per-pupil spending varies 24.2× across districts
Per-pupil spending in Arizona ranges from $3,655 (lowest district) to $88,514 (highest), a spread of $84,859. 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.
Arizona operates 661 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 Arizona student-teacher ratio is 17:1 - near the U.S. average of approximately 16:1
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. Variation between districts within the state is wider than the state-average figure suggests, large urban districts may run 20:1 while small rural districts run 10:1, both inside the same average. Class-load comparisons are most meaningful at the district or school level, not the state aggregate.
Arizona's public schools average a Simpson diversity index of 47.2/100, 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 Arizona 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 Arizona data
Arizona's 2,186 schools sit inside 661 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 Arizona 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 Arizona?
Arizona has 2,186 public schools across 661 school districts, serving 1,103,092 students.
What is the average student-teacher ratio in Arizona?
The average student-teacher ratio in Arizona public schools is 17:1. This varies by district, use the district table below to compare.
What percentage of Arizona students qualify for free lunch?
48.3% of students in Arizona qualify for free or reduced-price lunch, an indicator of economic need used for Title I funding.
What is the largest school district in Arizona?
The largest school district in Arizona is Mesa Unified District (4235) with 58,343 students across 78 schools.
Why does per-pupil spending vary so much across Arizona districts?
Arizona districts spend between $3,655 and $88,514 per pupil, a 24.2× range. This is an EXTREME spread even by U.S. standards, where most states show ratios well under 10×. A gap this wide usually signals a small number of outlier districts (often tiny rural or specialty districts) skewing the range rather than a uniform statewide pattern. 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
Primavera - Online
6,378
Primavera - Online
6,378 students
100.0% of the leader · rank #1 · Chandler, AZ
Arizona Virtual Academy
4,476
Arizona Virtual Academy
4,476 students
70.2% of the leader · rank #2 · Phoenix, AZ
Asu Preparatory Academ…
3,850
Asu Preparatory Academy Digital
3,850 students
60.4% of the leader · rank #3 · Tempe, AZ
Hamilton High School
3,444
Hamilton High School
3,444 students
54.0% of the leader · rank #4 · Chandler, AZ
Mountain View High Sch…
3,421
Mountain View High School
3,421 students
53.6% of the leader · rank #5 · Mesa, AZ
Red Mountain High School
3,379
Red Mountain High School
3,379 students
53.0% of the leader · rank #6 · Mesa, AZ
Mesa High School
3,233
Mesa High School
3,233 students
50.7% of the leader · rank #7 · Mesa, AZ
Chandler High School
3,179
Chandler High School
3,179 students
49.8% of the leader · rank #8 · Chandler, AZ
What this shows The largest public schools in Arizona 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.