Zip code 85021 is not served by one district. An elementary district and a separate secondary district each cover this area, which is normal in this state — which one your child attends depends on their grade.
| GRADES | DISTRICT | RATING |
|---|---|---|
| Pre-K–8 Elementary | Washington Elementary District 19,328 students · 33 schools | 5/10 |
| 9–12 Secondary | Glendale Union High School District 16,535 students · 11 schools | 7/10 |
| Metric | Glendale Union High School District | National Average | Comparison |
|---|---|---|---|
| Student Enrollment | 16,535 | 3,544 | ↑ Larger than avg |
| Number of Schools | 11 | 7 | Varies by district |
| Per-Pupil Spending | $11,450/yr | $17,619/yr | ↓ 35% below avg |
| District Type | Charter School District | Public District | — |
| Overall Rating | 7/10 — Good | — | Above average |
| District | Rating | Percentile | Students |
|---|---|---|---|
| Glendale Union High School District (this district) | 7/10 | 61st | 16,535 |
| Phoenix Union High School District | 2/10 | 14th | 27,900 |
| Paradise Valley Unified District | 8/10 | 74th | 27,919 |
| Peoria Unified School District | 7/10 | 65th | 36,527 |
🔢 Show the math behind this rating
Ranked against 492 rated districts in AZ → 61st percentile → 7/10.
Source: Arizona Dept. of Education AASA/ACT/MSAA combined assessments, Percent Passing, 2025. Full methodology →
- Sunnyslope High School — 1.2 mi · Grades 9–12 · 2,322 students
- Washington High School — 1.7 mi · Grades 9–12 · 1,659 students
- Cortez High School — 1.9 mi · Grades 9–12 · 1,132 students
- Moon Valley High School — 3.4 mi · Grades 9–12 · 1,471 students
- Thunderbird High School — 3.6 mi · Grades 9–12 · 1,592 students
- Glendale Union High School District Online Learning Academy — 3.6 mi · Grades 9–12 · 468 students
- Glendale Union Online — 3.6 mi · Grades 9–12 · 285 students
- Apollo High School — 3.7 mi · Grades 9–12 · 2,152 students
About Glendale Union High School District
Zip code 85021 in Glendale Union, Arizona is served by Glendale Union High School District for public school enrollment. The district covers grades 9th – 12th. This page provides a data-driven overview of Glendale Union High School District’s funding levels, size, rating, and what families should know before enrolling or making a housing decision in this area.
Understanding the 7/10 Rating
SchoolDistrictFinder rates Glendale Union High School District 7 out of 10 — above average among Arizona public school districts. Our ratings are based on state assessment results — the share of students scoring proficient or above in reading and math, as reported in Arizona’s AASA/ACT/MSAA combined assessments (2025 school year). We average each district’s reading and math proficiency, then rank it against other districts in the same state to produce a 1–10 score. Because Arizona is compared only against itself, the rating reflects how this district performs relative to its in-state peers.
Glendale Union High School District earns an above-average rating, with reading and math proficiency rates stronger than most other districts in Arizona. Above-average districts generally show solid and consistent academic results across their schools. Families considering this area will find a district with meaningful academic strengths. Research the specific schools assigned to your address — even above-average districts have variation between individual buildings.
Enrollment for Families in Zip Code 85021
Children in zip code 85021 are assigned to Glendale Union High School District for public school enrollment, covering grades 9th – 12th. School assignments are address-specific — your elementary, middle, and high school placements depend on your exact street address within zip code 85021, not just your neighborhood. Two homes on opposite ends of the same zip code may be assigned to different schools within the same district.
To confirm your specific school assignments, contact Glendale Union High School District at (623)435-6000 or visit the district’s official website. Typical enrollment documents include a signed lease or mortgage statement, birth certificate, state-required immunization documentation, and recent report cards or transcripts. If your child has an IEP or 504 plan, bring that documentation to enrollment — Arizona districts are required to continue services within a reasonable period. Fall enrollment windows typically open in late winter or early spring; contact the district for exact dates and required steps.
School Districts and Home Values in Phoenix
Research consistently shows that district assignment affects residential property values. Because Glendale Union High School District serves zip code 85021, homes in and around zip code 85021 often carry a measurable premium over comparable properties in adjacent lower-rated districts. District boundaries are address-specific — verify the exact district assignment for any property you’re seriously considering rather than assuming based on the neighborhood. A single block can place two adjacent homes in different districts with different ratings and different annual property tax implications.
Use the property tax estimator on this page to calculate estimated annual tax obligations based on your target purchase price. In Arizona, property taxes are a primary funding source for public schools — your tax payments directly support Glendale Union High School District programs and staff. Understanding both district quality and the associated tax burden is essential financial due diligence before committing to any home in zip code 85021.
Data Sources and Accuracy
All district information on this page is sourced from the NCES Common Core of Data (CCD) 2024–2025, the U.S. Department of Education’s annual census of all public school districts — the same dataset used by researchers, journalists, and policymakers to analyze American public education. District boundaries, school assignments and phone numbers are updated annually when NCES publishes new data, typically in spring; per-pupil spending comes from the US Census Bureau's Annual Survey of School System Finances, released about two years after the fiscal year it covers. Always verify your specific school assignment and enrollment requirements directly with Glendale Union High School District before making any housing or enrollment decision based on zip code 85021 data.