allk12 · Rankings · Lowest proficiency · California · Contra Costa County · Middle schools

The lowest-performing public middle schools by test proficiency in Contra Costa County, California

Across Contra Costa County, California, 39 public middle schools are ranked here, ranked by the lowest composite state-assessment proficiency. Helms Middle leads the list at 7.4%, against a median of 40.9% 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

Contra Costa County, California

Best % Proficient

7.4%

Median % Proficient

40.9%

LOWEST PROFICIENCY · CONTRA COSTA COUNTY, CALIFORNIA

#	School	City	District	Level	% FRL	Students	% Proficient
1	Helms Middle	San Pablo, CA	West Contra Costa Unified	Middle	81.9%	558	7.4%
2	Lovonya DeJean Middle	Richmond, CA	West Contra Costa Unified	Middle	81.9%	381	7.6%
3	Antioch Middle	Antioch, CA	Antioch Unified	Middle	93.5%	665	8.7%
4	Oak Grove Middle	Concord, CA	Mt. Diablo Unified	Middle	88.0%	681	11.8%
5	Riverview Middle	Bay Point, CA	Mt. Diablo Unified	Middle	89.3%	682	12.8%
6	Park Middle	Antioch, CA	Antioch Unified	Middle	89.3%	1,055	14.8%
7	Betty Reid Soskin Middle	El Sobrante, CA	West Contra Costa Unified	Middle	55.4%	372	15.6%
8	El Dorado Middle	Concord, CA	Mt. Diablo Unified	Middle	75.4%	861	16.8%
9	Black Diamond Middle	Antioch, CA	Antioch Unified	Middle	81.0%	358	17.7%
10	Hillview Junior High	Pittsburg, CA	Pittsburg Unified	Middle	81.2%	893	18.6%
11	Rancho Medanos Junior High	Pittsburg, CA	Pittsburg Unified	Middle	82.5%	812	18.9%
12	Dallas Ranch Middle	Antioch, CA	Antioch Unified	Middle	78.2%	795	19.4%
13	Carquinez Middle	Crockett, CA	John Swett Unified	Middle	83.6%	286	19.6%
14	Pinole Middle	Pinole, CA	West Contra Costa Unified	Middle	80.1%	381	21.4%
15	Martin Luther King Jr. Junior High	Pittsburg, CA	Pittsburg Unified	Middle	84.4%	706	23.3%
16	Delta Vista Middle	Oakley, CA	Oakley Union Elementary	Middle	43.9%	873	25.3%
17	O'Hara Park Middle	Oakley, CA	Oakley Union Elementary	Middle	41.8%	856	27.4%
18	Excelsior Middle	Byron, CA	Byron Union Elementary	Middle	33.2%	377	36.1%
19	Pine Hollow Middle	Concord, CA	Mt. Diablo Unified	Middle	57.1%	538	37.9%
20	Hercules Middle	Hercules, CA	West Contra Costa Unified	Middle	44.3%	596	40.9%
21	Valley View Middle	Pleasant Hill, CA	Mt. Diablo Unified	Middle	49.7%	819	43.0%
22	Fred T. Korematsu Middle	El Cerrito, CA	West Contra Costa Unified	Middle	38.6%	708	43.7%
23	Pleasant Hill Middle	Pleasant Hill, CA	Mt. Diablo Unified	Middle	44.4%	738	45.8%
24	Martinez Junior High	Martinez, CA	Martinez Unified	Middle	32.7%	843	49.2%
25	Sequoia Middle	Pleasant Hill, CA	Mt. Diablo Unified	Middle	50.1%	882	54.0%
26	Diablo View Middle	Clayton, CA	Mt. Diablo Unified	Middle	23.5%	514	59.6%
27	Stone Valley Middle	Alamo, CA	San Ramon Valley Unified	Middle	8.4%	586	63.4%
28	Foothill Middle	Walnut Creek, CA	Mt. Diablo Unified	Middle	8.4%	1,005	64.0%
29	Walnut Creek Intermediate	Walnut Creek, CA	Walnut Creek Elementary	Middle	15.3%	940	64.9%
30	Charlotte Wood Middle	Danville, CA	San Ramon Valley Unified	Middle	5.2%	853	65.6%
31	Los Cerros Middle	Danville, CA	San Ramon Valley Unified	Middle	5.1%	486	65.8%
32	M. H. Stanley Middle	Lafayette, CA	Lafayette Elementary	Middle	5.0%	1,117	75.7%
33	Joaquin Moraga Intermediate	Moraga, CA	Moraga Elementary	Middle	6.1%	658	75.9%
34	Diablo Vista Middle	Danville, CA	San Ramon Valley Unified	Middle	8.3%	835	76.7%
35	Iron Horse Middle	San Ramon, CA	San Ramon Valley Unified	Middle	9.9%	939	76.8%
36	Pine Valley Middle	San Ramon, CA	San Ramon Valley Unified	Middle	6.8%	973	76.9%
37	Gale Ranch Middle	San Ramon, CA	San Ramon Valley Unified	Middle	9.8%	971	77.7%
38	Orinda Intermediate	Orinda, CA	Orinda Union	Middle	3.8%	822	82.2%
39	Windemere Ranch Middle	San Ramon, CA	San Ramon Valley Unified	Middle	8.2%	1,011	82.9%

Page 1 of 1 · top 39 of 39 ranked. NCES + state assessment data, 2024-25.↓ Download full CSV

All schools in Contra Costa County →

Lowest proficiency rankings at a wider scope

All California Nationwide

Other rankings for Contra Costa County, California

Largest Most diverse Lowest ratio Highest proficiency Fastest growing Highest poverty Lowest poverty Highest ratio Fastest declining Most Hispanic Most Black Most White Most 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.