Concord · Contra Costa County

Schools in ZIP code 94521

Two districts run the ranked public schools in ZIP code 94521: Mt. Diablo Unified (elementary, middle and high) and Contra Costa County Office of Education (high). The 5 public elementary schools in ZIP code 94521 run from the 27th to the 75th percentile among the 5,726 California elementary schools we score (spring 2026 tests).

Elementary · 5 schools · Mt. Diablo Unified

from 27th to 75th · among 5,726 California elementary schools we score · spring 2026 tests

  • Silverwood Elementary: 75th percentile, Strong
  • Highlands Elementary: 64th percentile, Solid
  • Mountain View Elementary: 47th percentile, Developing
  • Ayers Elementary: 43rd percentile, Developing
  • Westwood Elementary: 27th percentile, Developing
0Needs Support
3Developing
1Solid
1Strong

One dot per school.

A ZIP code doesn’t decide which school a child attends. Confirm the school for your address with the district.

Middle and high school pictures

Middle · 2 schools · Mt. Diablo Unified

from 22nd to 44th · among 2,529 California middle schools we score · spring 2026 tests

  • Pine Hollow Middle: 44th percentile, Developing
  • El Dorado Middle: 22nd percentile, Needs Support
1Needs Support
1Developing
0Solid
0Strong

High · 2 schools · Contra Costa County Office of Education and Mt. Diablo Unified

from 25th to 80th · among 1,498 California high schools we score · spring 2025 tests

  • Clayton Valley Charter High: 80th percentile, Strong
  • Concord High: 25th percentile, Developing
0Needs Support
1Developing
0Solid
1Strong

One dot per school. Each stage is placed only among California schools at its own level.

Schools around ZIP code 94521

9 listed public schools with mapped locations.

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Percentile among California schools at the same level

  • Strong75th+
  • Solid50–74th
  • Developing25–49th
  • Needs Supportbelow 25th
  • Not scored

The school lists on this page are also available without the map.

Elementary schools

Which elementary schools in ZIP code 94521 score highest?

Silverwood Elementary is highest, at the 75th percentile.

That’s higher than 75 in 100 of the 5,726 California elementary schools we score (spring 2026 tests).

Highest in ZIP code 94521

Each percentile compares a school with California schools at its own level.

Show the other 2 elementary schools
Context

The average elementary school in ZIP code 94521 had 17 in 100 students chronically absent (missed 10% or more of school days) in 2025–26; the average California elementary school we score had 17 in 100. Both are averages of school rates, each school counted once.

Middle schools

Which middle schools in ZIP code 94521 score highest?

Pine Hollow Middle is highest, at the 44th percentile.

That’s higher than 44 in 100 of the 2,529 California middle schools we score (spring 2026 tests).

Highest in ZIP code 94521

Each percentile compares a school with California schools at its own level.

High schools

Which high schools in ZIP code 94521 score highest?

Clayton Valley Charter High is highest, at the 80th percentile.

That’s higher than 80 in 100 of the 1,498 California high schools we score (spring 2025 tests).

Highest in ZIP code 94521

Each percentile compares a school with California schools at its own level.

  • Clayton Valley Charter HighContra Costa County Office of Education · Charter school. Check how it admits students.
    80thStrongScope Score 69
  • Concord HighMt. Diablo Unified
    25thDevelopingScope Score 48

6 private schools have an address in ZIP code 94521. They don’t take California’s state tests, so we don’t score them. See them in the private-school directory →

Which places nearby can you look at next?

Nearby ZIP codes

More places (8)

School districts

City

Before kindergarten

Common questions

Which public schools in ZIP code 94521 rank highest?

Elementary: Silverwood Elementary, 75th percentile (Strong). Middle: Pine Hollow Middle, 44th percentile (Developing). High: Clayton Valley Charter High, 80th percentile (Strong). Each percentile is among the California schools at the same level we score. A rank doesn’t decide fit or whether a child can enroll.

Does living in ZIP code 94521 decide which school my child attends?

No. ZIP codes are for mail; attendance boundaries decide the school for an address. Confirm the school for your address, grade and program with the district.
More questions (3)

Are the public schools in ZIP code 94521 good?

The 5 public elementary schools in ZIP code 94521 run from the 27th to the 75th percentile among the 5,726 California elementary schools we score (spring 2026 tests). By band: 1 Strong, 1 Solid and 3 Developing. The 2 public middle schools in ZIP code 94521 run from the 22nd to the 44th percentile among the 2,529 California middle schools we score (spring 2026 tests). By band: 1 Developing and 1 Needs Support. The 2 public high schools in ZIP code 94521 run from the 25th to the 80th percentile among the 1,498 California high schools we score (spring 2025 tests). By band: 1 Strong and 1 Developing. A percentile compares a school with California public schools at the same level that we score. How we score schools.

How does chronic absence in ZIP code 94521 compare with California?

The average elementary school in ZIP code 94521 had 17 in 100 students chronically absent (missed 10% or more of school days) in 2025–26; the average California elementary school we score had 17 in 100. Both are averages of school rates, each school counted once. These are averages of school rates: each school counts once, whatever its size.

Where do these results come from?

California’s state tests (CAASPP): spring 2026 for elementary and middle schools, spring 2025 for high schools, and chronic-absence rates for 2025–26, published by the California Department of Education. Percentiles, bands and Scope Scores are SchoolScope’s calculations. How we score schools.

Sources and methodology

This page lists the schools with a 94521 mailing address. Attendance zones follow school districts rather than postal boundaries.

Data source: California Department of Education · CAASPP 2025–26 elementary and middle school; 2024–25 high school

Percentiles, bands and Scope Scores are SchoolScope’s own calculations from these state files.

View CDE data ↗ (opens in a new tab)How Scope Scores work →

Download these schools (CSV)Free to use under CC BY 4.0 with attribution.