Largest Schools in Mt. Diablo Unified (2025)
Schools with the highest enrollment. Ranked by the Success Index (US) from official American data; 44 schools in Mt. Diablo Unified, California. Rank positions shown on each profile are within United States and California.
- Elementary Schools in Mt. Diablo Unified
- Middle Schools in Mt. Diablo Unified
- High Schools in Mt. Diablo Unified
- Traditional Public Schools in Mt. Diablo Unified
- Schools by Math Proficiency in Mt. Diablo Unified
- Schools by Reading Proficiency in Mt. Diablo Unified
- Lowest Student–Teacher Ratio in Mt. Diablo Unified
- 160College Park HighPleasant Hill · Public HighEnrollment: 1,948
- 272Northgate HighWalnut Creek · Public HighEnrollment: 1,546
- 319Mt. Diablo HighConcord · Public HighEnrollment: 1,397
- 436Concord HighConcord · Public HighEnrollment: 1,137
- 518Ygnacio Valley HighConcord · Public HighEnrollment: 1,059
- 679Foothill MiddleWalnut Creek · Public MiddleEnrollment: 1,005
- 755Sequoia MiddlePleasant Hill · Public MiddleEnrollment: 882
- 812El Dorado MiddleConcord · Public MiddleEnrollment: 861
- 949Hidden Valley ElementaryMartinez · Public ElementaryEnrollment: 831
- 1048Valley View MiddlePleasant Hill · Public MiddleEnrollment: 819
- 1171Mt. Diablo ElementaryClayton · Public ElementaryEnrollment: 739
- 1250Pleasant Hill MiddlePleasant Hill · Public MiddleEnrollment: 738
- 1311Meadow Homes ElementaryConcord · Public ElementaryEnrollment: 732
- 1472Valhalla ElementaryPleasant Hill · Public ElementaryEnrollment: 721
- 1575Walnut Acres ElementaryWalnut Creek · Public ElementaryEnrollment: 689
- 1610Riverview MiddleBay Point · Public MiddleEnrollment: 682
- 179Oak Grove MiddleConcord · Public MiddleEnrollment: 681
- 1867Bancroft ElementaryWalnut Creek · Public ElementaryEnrollment: 672
- 1930Delta View ElementaryPittsburg · Public ElementaryEnrollment: 656
- 2059Pleasant Hill ElementaryPleasant Hill · Public ElementaryEnrollment: 652
- 2169Strandwood ElementaryPleasant Hill · Public ElementaryEnrollment: 596
- 2271Sequoia ElementaryPleasant Hill · Public ElementaryEnrollment: 594
- 2362Monte Gardens ElementaryConcord · Public ElementaryEnrollment: 562
- 2442Pine Hollow MiddleConcord · Public MiddleEnrollment: 538
- 2556Silverwood ElementaryConcord · Public ElementaryEnrollment: 530
- 2666Diablo View MiddleClayton · Public MiddleEnrollment: 514
- 2759Highlands ElementaryConcord · Public ElementaryEnrollment: 512
- 2820Holbrook Language AcademyConcord · Public ElementaryEnrollment: 501
- 2972Valle Verde ElementaryWalnut Creek · Public ElementaryEnrollment: 485
- 306Cambridge ElementaryConcord · Public ElementaryEnrollment: 469
- 3114Rio Vista ElementaryBay Point · Public ElementaryEnrollment: 431
- 3226El Monte ElementaryConcord · Public ElementaryEnrollment: 418
- 3315Sun Terrace ElementaryConcord · Public ElementaryEnrollment: 418
- 3438Gregory Gardens ElementaryPleasant Hill · Public ElementaryEnrollment: 409
- 358Shore Acres ElementaryBay Point · Public ElementaryEnrollment: 398
- 3653Ayers ElementaryConcord · Public ElementaryEnrollment: 394
- 3712Ygnacio Valley ElementaryConcord · Public ElementaryEnrollment: 387
- 3822Wren Avenue ElementaryConcord · Public ElementaryEnrollment: 349
- 399Bel Air ElementaryBay Point · Public ElementaryEnrollment: 328
- 4015Fair Oaks ElementaryPleasant Hill · Public ElementaryEnrollment: 323
- 4168Eagle Peak MontessoriWalnut Creek · Charter ElementaryEnrollment: 301
- 4244Woodside ElementaryConcord · Public ElementaryEnrollment: 289
- 4339Mountain View ElementaryConcord · Public ElementaryEnrollment: 267
- 4424Westwood ElementaryConcord · Public ElementaryEnrollment: 224
| # | School | Sector | Enrollment | Success Index (US) | Key result | Students |
|---|---|---|---|---|---|---|
| 1 | College Park High Pleasant Hill · High · Grades 9–12 | Public | 1,948 | 60.0 Top 50% | 48% Math proficiency | 1,948 |
| 2 | Northgate High Walnut Creek · High · Grades 9–12 | Public | 1,546 | 72.4 Top 25% | 63% Math proficiency | 1,546 |
| 3 | Mt. Diablo High Concord · High · Grades 9–12 | Public | 1,397 | 18.5 Lower 50% | 15% Math proficiency | 1,397 |
| 4 | Concord High Concord · High · Grades 9–12 | Public | 1,137 | 36.0 Lower 50% | 29% Math proficiency | 1,137 |
| 5 | Ygnacio Valley High Concord · High · Grades 9–12 | Public | 1,059 | 17.5 Lower 50% | 13% Math proficiency | 1,059 |
| 6 | Foothill Middle Walnut Creek · Middle · Grades 6–8 | Public | 1,005 | 78.6 Top 25% | 68% Math proficiency | 1,005 |
| 7 | Sequoia Middle Pleasant Hill · Middle · Grades 6–8 | Public | 882 | 55.4 Top 50% | 48% Math proficiency | 882 |
| 8 | El Dorado Middle Concord · Middle · Grades 6–8 | Public | 861 | 11.5 Lower 50% | 12% Math proficiency | 861 |
| 9 | Hidden Valley Elementary Martinez · Elementary · Grades K–5 | Public | 831 | 49.2 Lower 50% | 51% Math proficiency | 831 |
| 10 | Valley View Middle Pleasant Hill · Middle · Grades 6–8 | Public | 819 | 47.9 Lower 50% | 42% Math proficiency | 819 |
| 11 | Mt. Diablo Elementary Clayton · Elementary · Grades K–5 | Public | 739 | 70.8 Top 25% | 63% Math proficiency | 739 |
| 12 | Pleasant Hill Middle Pleasant Hill · Middle · Grades 6–8 | Public | 738 | 50.0 Top 50% | 42% Math proficiency | 738 |
| 13 | Meadow Homes Elementary Concord · Elementary · Grades K–5 | Public | 732 | 11.3 Lower 50% | 22% Math proficiency | 732 |
| 14 | Valhalla Elementary Pleasant Hill · Elementary · Grades K–5 | Public | 721 | 72.4 Top 25% | 68% Math proficiency | 721 |
| 15 | Walnut Acres Elementary Walnut Creek · Elementary · Grades K–5 | Public | 689 | 75.0 Top 25% | 67% Math proficiency | 689 |
| 16 | Riverview Middle Bay Point · Middle · Grades 6–8 | Public | 682 | 9.5 Lower 50% | 10% Math proficiency | 682 |
| 17 | Oak Grove Middle Concord · Middle · Grades 6–8 | Public | 681 | 8.6 Lower 50% | 8% Math proficiency | 681 |
| 18 | Bancroft Elementary Walnut Creek · Elementary · Grades K–5 | Public | 672 | 66.8 Top 50% | 61% Math proficiency | 672 |
| 19 | Delta View Elementary Pittsburg · Elementary · Grades K–5 | Public | 656 | 29.9 Lower 50% | 35% Math proficiency | 656 |
| 20 | Pleasant Hill Elementary Pleasant Hill · Elementary · Grades K–5 | Public | 652 | 58.7 Top 50% | 55% Math proficiency | 652 |
| 21 | Strandwood Elementary Pleasant Hill · Elementary · Grades K–5 | Public | 596 | 69.1 Top 25% | 62% Math proficiency | 596 |
| 22 | Sequoia Elementary Pleasant Hill · Elementary · Grades K–5 | Public | 594 | 71.1 Top 25% | 67% Math proficiency | 594 |
| 23 | Monte Gardens Elementary Concord · Elementary · Grades K–5 | Public | 562 | 62.2 Top 50% | 58% Math proficiency | 562 |
| 24 | Pine Hollow Middle Concord · Middle · Grades 6–8 | Public | 538 | 41.6 Lower 50% | 39% Math proficiency | 538 |
| 25 | Silverwood Elementary Concord · Elementary · Grades K–5 | Public | 530 | 55.7 Top 50% | 57% Math proficiency | 530 |
| 26 | Diablo View Middle Clayton · Middle · Grades 6–8 | Public | 514 | 66.1 Top 50% | 49% Math proficiency | 514 |
| 27 | Highlands Elementary Concord · Elementary · Grades K–5 | Public | 512 | 58.9 Top 50% | 54% Math proficiency | 512 |
| 28 | Holbrook Language Academy Concord · Elementary · Grades K–8 | Public | 501 | 20.4 Lower 50% | 32% Math proficiency | 501 |
| 29 | Valle Verde Elementary Walnut Creek · Elementary · Grades K–5 | Public | 485 | 72.3 Top 25% | 70% Math proficiency | 485 |
| 30 | Cambridge Elementary Concord · Elementary · Grades K–5 | Public | 469 | 5.9 Lower 50% | 13% Math proficiency | 469 |
| 31 | Rio Vista Elementary Bay Point · Elementary · Grades K–5 | Public | 431 | 14.2 Lower 50% | 18% Math proficiency | 431 |
| 32 | El Monte Elementary Concord · Elementary · Grades K–5 | Public | 418 | 25.9 Lower 50% | 27% Math proficiency | 418 |
| 33 | Sun Terrace Elementary Concord · Elementary · Grades K–5 | Public | 418 | 14.8 Lower 50% | 19% Math proficiency | 418 |
| 34 | Gregory Gardens Elementary Pleasant Hill · Elementary · Grades K–5 | Public | 409 | 37.7 Lower 50% | 32% Math proficiency | 409 |
| 35 | Shore Acres Elementary Bay Point · Elementary · Grades K–5 | Public | 398 | 8.3 Lower 50% | 11% Math proficiency | 398 |
| 36 | Ayers Elementary Concord · Elementary · Grades K–5 | Public | 394 | 53.4 Top 50% | 50% Math proficiency | 394 |
| 37 | Ygnacio Valley Elementary Concord · Elementary · Grades K–5 | Public | 387 | 12.3 Lower 50% | 21% Math proficiency | 387 |
| 38 | Wren Avenue Elementary Concord · Elementary · Grades K–5 | Public | 349 | 21.8 Lower 50% | 22% Math proficiency | 349 |
| 39 | Bel Air Elementary Bay Point · Elementary · Grades K–5 | Public | 328 | 9.0 Lower 50% | 11% Math proficiency | 328 |
| 40 | Fair Oaks Elementary Pleasant Hill · Elementary · Grades K–5 | Public | 323 | 14.7 Lower 50% | 17% Math proficiency | 323 |
| 41 | Eagle Peak Montessori Walnut Creek · Elementary · Grades 1–8 | Charter | 301 | 67.7 Top 50% | 52% Math proficiency | 301 |
| 42 | Woodside Elementary Concord · Elementary · Grades K–5 | Public | 289 | 44.3 Lower 50% | 47% Math proficiency | 289 |
| 43 | Mountain View Elementary Concord · Elementary · Grades K–5 | Public | 267 | 38.6 Lower 50% | 37% Math proficiency | 267 |
| 44 | Westwood Elementary Concord · Elementary · Grades K–5 | Public | 224 | 24.3 Lower 50% | 22% Math proficiency | 224 |
College Park High in Pleasant Hill leads the 2025 list of largest schools in Mt. Diablo Unified with Enrollment 1,948. Of the 44 schools shown, 43 are public, 1 are charter.
For the full picture see the wider California largest schools rankings, every school on the Mt. Diablo Unified page, or the comparison tool to put a shortlist side by side.
Free academic assessment
Is your child on grade level in reading and math?
Success Tutoring offers personalised English and math tutoring from Kindergarten to Grade 12. Start with a free online assessment and a clear plan for the year ahead.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Centres across NSW, VIC, QLD, WA, SA and ACT
Frequently asked questions
What is the best largest school in Mt. Diablo Unified?
College Park High in Pleasant Hill, California ranks first among largest schools in Mt. Diablo Unified with Enrollment 1,948 (Enrollment: 1,948).
How are largest schools in Mt. Diablo Unified ranked?
Schools with the highest enrollment. Only schools eligible for the Success Index (US) are included; the index is shown alongside for context.
Are these 2025 rankings official?
No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.