The bulletin board for America's public schools. Parents, teachers, students, and staff. One community per school.
allk12 · Rankings · Lowest ratio · California · Contra Costa County

The public schools with the lowest student-to-teacher ratios in Contra Costa County, California

This ranking covers the public schools with the lowest student-to-teacher ratios in Contra Costa County, California, drawn from 247 qualifying public schools. Black Diamond High (Continuation) leads the list at 11.9:1, against a median of 22.5:1 across the ranked schools.

Sort any column, filter to a school or district, or download the full ranking as a CSV. Source data is federal NCES and state assessment reporting, 2024-25.

Schools ranked
247
Contra Costa County, California
Best Students/teacher
11.9:1
Median Students/teacher
22.5:1
LOWEST RATIO · CONTRA COSTA COUNTY, CALIFORNIA
#SchoolCityDistrictLevelStudentsRatio
1Black Diamond High (Continuation)Pittsburg, CAPittsburg UnifiedHigh20511.9:1
2Prospects High (Alternative)Antioch, CAAntioch UnifiedCombined30413.8:1
3Olympic HighConcord, CAMt. Diablo UnifiedHigh23314.4:1
4Invictus Academy of RichmondEl Cerrito, CAInvictus Academy of Richmond DistrictHigh40316.5:1
5Greenwood AcademyRichmond, CAWest Contra Costa UnifiedHigh20017.8:1
6Stege ElementaryRichmond, CAWest Contra Costa UnifiedElementary22518.1:1
7Collins ElementaryPinole, CAWest Contra Costa UnifiedElementary31118.3:1
8Caliber: Beta AcademySan Pablo, CACaliber: Beta Academy DistrictElementary97118.3:1
9Betty Reid Soskin MiddleEl Sobrante, CAWest Contra Costa UnifiedMiddle37218.5:1
10John Swett HighCrockett, CAJohn Swett UnifiedHigh35118.5:1
11M. H. Stanley MiddleLafayette, CALafayette ElementaryMiddle1,11718.9:1
12Ygnacio Valley HighConcord, CAMt. Diablo UnifiedHigh1,05919.0:1
13Miramonte HighOrinda, CAAcalanes Union HighHigh1,16719.0:1
14Antioch Charter AcademyAntioch, CAAntioch Charter Academy DistrictElementary20219.1:1
15Excelsior MiddleByron, CAByron Union ElementaryMiddle37719.1:1
16Orinda IntermediateOrinda, CAOrinda UnionMiddle82219.1:1
17Montair ElementaryDanville, CASan Ramon Valley UnifiedElementary48419.1:1
18Making Waves AcademyRichmond, CAMaking Waves Academy DistrictHigh1,07819.2:1
19Las Juntas ElementaryMartinez, CAMartinez UnifiedElementary35319.2:1
20Turner ElementaryAntioch, CAAntioch UnifiedElementary43619.3:1
21John F. Kennedy HighRichmond, CAWest Contra Costa UnifiedHigh74019.3:1
22Live Oak ElementarySan Ramon, CASan Ramon Valley UnifiedElementary43819.3:1
23Las Lomas HighWalnut Creek, CAAcalanes Union HighHigh1,57719.5:1
24Acalanes HighLafayette, CAAcalanes Union HighHigh1,25619.5:1
25Concord HighConcord, CAMt. Diablo UnifiedHigh1,13719.5:1
26Bella Vista ElementarySan Ramon, CASan Ramon Valley UnifiedElementary49919.6:1
27Creekside ElementaryDanville, CASan Ramon Valley UnifiedElementary54919.6:1
28Grant ElementaryAntioch, CAAntioch UnifiedElementary47819.6:1
29Lupine Hills ElementaryHercules, CAWest Contra Costa UnifiedElementary38719.6:1
30Campolindo HighMoraga, CAAcalanes Union HighHigh1,34019.8:1
31Mt. Diablo HighConcord, CAMt. Diablo UnifiedHigh1,39719.8:1
32Ellerhorst ElementaryPinole, CAWest Contra Costa UnifiedElementary31919.9:1
33Los Cerros MiddleDanville, CASan Ramon Valley UnifiedMiddle48619.9:1
34Fremont ElementaryAntioch, CAAntioch UnifiedElementary48220.0:1
35Camino Pablo ElementaryMoraga, CAMoraga ElementaryElementary34020.0:1
36Country Club ElementarySan Ramon, CASan Ramon Valley UnifiedElementary50020.1:1
37Kimball ElementaryAntioch, CAAntioch UnifiedElementary45020.1:1
38Rodeo Hills ElementaryRodeo, CAJohn Swett UnifiedElementary53420.2:1
39Lincoln ElementaryRichmond, CAWest Contra Costa UnifiedElementary33920.2:1
40Lone Tree ElementaryAntioch, CAAntioch UnifiedElementary51820.3:1
41Green Valley ElementaryDanville, CASan Ramon Valley UnifiedElementary48420.3:1
42Lovonya DeJean MiddleRichmond, CAWest Contra Costa UnifiedMiddle38120.4:1
43Westwood ElementaryConcord, CAMt. Diablo UnifiedElementary22420.4:1
44Willow Cove ElementaryPittsburg, CAPittsburg UnifiedElementary59220.4:1
45Coronado ElementaryRichmond, CAWest Contra Costa UnifiedElementary30720.5:1
46Stewart ElementaryPinole, CAWest Contra Costa UnifiedElementary37920.5:1
47Wren Avenue ElementaryConcord, CAMt. Diablo UnifiedElementary34920.5:1
48Carquinez MiddleCrockett, CAJohn Swett UnifiedMiddle28620.6:1
49Oak Grove MiddleConcord, CAMt. Diablo UnifiedMiddle68120.6:1
50Muir (John) ElementaryAntioch, CAAntioch UnifiedElementary66020.7:1
Page 1 of 5 · top 247 of 247 ranked. NCES + state assessment data, 2024-25.↓ Download full CSV

All schools in Contra Costa County →

Lowest ratio rankings at a wider scope

All CaliforniaNationwide

Other rankings for Contra Costa County, California

LargestMost diverseHighest proficiencyFastest growingHighest povertyLowest povertyHighest ratioFastest decliningLowest proficiencyMost HispanicMost BlackMost WhiteMost Asian

All ranking categories →

DATA NOTICE

allk12 is independent and not affiliated with, endorsed by, or sponsored by NCES, the US Census Bureau, any state education agency or assessment program, or any other government agency. Source data is compiled from public records and provided "as is," without warranty of accuracy or completeness. You rely on it, and any analysis derived from it, at your own risk. See the full disclaimer.