allk12 · Rankings · Lowest ratio · California · Contra Costa County · High schools

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

This ranking covers the public high schools with the lowest student-to-teacher ratios in Contra Costa County, California, drawn from 41 qualifying public high schools. Black Diamond High (Continuation) leads the list at 11.9:1, against a median of 22.0:1 across the ranked schools.

The table below is sortable and filterable, and the full list downloads as a CSV. Figures come from federal NCES enrollment data and, where applicable, state assessment results for 2024-25.

Schools ranked

Contra Costa County, California

Best Students/teacher

11.9:1

Median Students/teacher

22.0:1

LOWEST RATIO · CONTRA COSTA COUNTY, CALIFORNIA

#	School	City	District	Level	Students	Ratio
1	Black Diamond High (Continuation)	Pittsburg, CA	Pittsburg Unified	High	205	11.9:1
2	Olympic High	Concord, CA	Mt. Diablo Unified	High	233	14.4:1
3	Invictus Academy of Richmond	El Cerrito, CA	Invictus Academy of Richmond District	High	403	16.5:1
4	Greenwood Academy	Richmond, CA	West Contra Costa Unified	High	200	17.8:1
5	John Swett High	Crockett, CA	John Swett Unified	High	351	18.5:1
6	Ygnacio Valley High	Concord, CA	Mt. Diablo Unified	High	1,059	19.0:1
7	Miramonte High	Orinda, CA	Acalanes Union High	High	1,167	19.0:1
8	Making Waves Academy	Richmond, CA	Making Waves Academy District	High	1,078	19.2:1
9	John F. Kennedy High	Richmond, CA	West Contra Costa Unified	High	740	19.3:1
10	Las Lomas High	Walnut Creek, CA	Acalanes Union High	High	1,577	19.5:1
11	Acalanes High	Lafayette, CA	Acalanes Union High	High	1,256	19.5:1
12	Concord High	Concord, CA	Mt. Diablo Unified	High	1,137	19.5:1
13	Campolindo High	Moraga, CA	Acalanes Union High	High	1,340	19.8:1
14	Mt. Diablo High	Concord, CA	Mt. Diablo Unified	High	1,397	19.8:1
15	Antioch High	Antioch, CA	Antioch Unified	High	1,776	20.9:1
16	Alhambra Senior High	Martinez, CA	Martinez Unified	High	1,028	21.1:1
17	Leadership Public Schools: Richmond	Richmond, CA	Leadership Public Schools: Richmond District	High	546	21.3:1
18	Freedom High	Oakley, CA	Liberty Union High	High	2,460	21.5:1
19	Pittsburg Senior High	Pittsburg, CA	Pittsburg Unified	High	3,403	21.5:1
20	Liberty High	Brentwood, CA	Liberty Union High	High	2,836	21.6:1
21	Contra Costa School of Performing Arts	Walnut Creek, CA	Contra Costa School of Performing Arts District	High	285	22.0:1
22	Monte Vista High	Danville, CA	San Ramon Valley Unified	High	2,042	22.0:1
23	Heritage High	Brentwood, CA	Liberty Union High	High	2,566	22.1:1
24	Summit Public School K2	El Cerrito, CA	Summit Public School K2 District	High	554	22.1:1
25	Richmond High	Richmond, CA	West Contra Costa Unified	High	1,280	22.4:1
26	San Ramon Valley High	Danville, CA	San Ramon Valley Unified	High	2,036	22.7:1
27	College Park High	Pleasant Hill, CA	Mt. Diablo Unified	High	1,948	22.9:1
28	De Anza High	Richmond, CA	West Contra Costa Unified	High	1,047	22.9:1
29	Deer Valley High	Antioch, CA	Antioch Unified	High	1,812	23.1:1
30	Northgate High	Walnut Creek, CA	Mt. Diablo Unified	High	1,546	23.1:1
31	Hercules High	Hercules, CA	West Contra Costa Unified	High	767	23.8:1
32	El Cerrito High	El Cerrito, CA	West Contra Costa Unified	High	1,460	24.0:1
33	Aspire Richmond Ca. College Preparatory Academy	Richmond, CA	Aspire Richmond Ca. College Preparatory Academy District	High	590	24.6:1
34	Dozier-Libbey Medical High	Antioch, CA	Antioch Unified	High	681	24.7:1
35	Dougherty Valley High	San Ramon, CA	San Ramon Valley Unified	High	3,039	24.8:1
36	Pinole Valley High	Pinole, CA	West Contra Costa Unified	High	1,245	24.8:1
37	California High	San Ramon, CA	San Ramon Valley Unified	High	2,894	24.8:1
38	Summit Public School: Tamalpais	Richmond, CA	Summit Public School: Tamalpais District	High	629	24.9:1
39	Clayton Valley Charter High	Concord, CA	Clayton Valley Charter High District	High	2,373	25.1:1
40	John Henry High	Richmond, CA	John Henry High District	High	333	27.8:1
41	Middle College High	San Pablo, CA	West Contra Costa Unified	High	294	30.7:1

Page 1 of 1 · top 41 of 41 ranked. NCES + state assessment data, 2024-25.↓ Download full CSV

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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.