Top 100 largest schools in California (2025)

Schools with the highest enrollment. Ordered by the measure shown, with the Success Index (US) for context; 100 schools shown.

#	School	Sector	Enrollment	Success Index (US)	Key result	Students
1	Eleanor Roosevelt High Eastvale · High · Grades 9–12	Public	4,353	52.7 Top 50%	51% Math proficiency	4,353
2	Downey High Downey · High · Grades 9–12	Public	4,051	33.7 Lower 50%	28% Math proficiency	4,051
3	Polytechnic High Long Beach · High · Grades 9–12	Public	3,890	42.7 Lower 50%	34% Math proficiency	3,890
4	Warren (Earl) High Downey · High · Grades 9–12	Public	3,609	29.2 Lower 50%	27% Math proficiency	3,609
5	Santiago High Corona · High · Grades 9–12	Public	3,577	47.9 Lower 50%	47% Math proficiency	3,577
6	Beaumont Senior High Beaumont · High · Grades 9–12	Public	3,460	29.3 Lower 50%	23% Math proficiency	3,460
7	Five Keys Independence HS (SF Sheriff's) San Francisco · High · Grades 9–12	Charter	3,447	21.0 Lower 50%	2.5% Math proficiency	3,447
8	Etiwanda High Etiwanda · High · Grades 9–12	Public	3,446	52.2 Top 50%	44% Math proficiency	3,446
9	Millikan High Long Beach · High · Grades 9–12	Public	3,408	51.1 Top 50%	38% Math proficiency	3,408
10	Pittsburg Senior High Pittsburg · High · Grades 9–12	Public	3,403	18.8 Lower 50%	20% Math proficiency	3,403
11	Paramount High Paramount · High · Grades 9–12	Public	3,400	19.2 Lower 50%	20% Math proficiency	3,400
12	Options For Youth - Duarte Inc Pasadena · High · Grades 7–12	Charter	3,369	11.5 Lower 50%	86% Free/reduced-price lunch	3,369
13	Wilson High Long Beach · High · Grades 9–12	Public	3,349	39.6 Lower 50%	25% Math proficiency	3,349
14	Vista Murrieta High Murrieta · High · Grades 9–12	Public	3,328	56.7 Top 50%	51% Math proficiency	3,328
15	Hollister High Hollister · High · Grades 9–12	Public	3,316	38.7 Lower 50%	31% Math proficiency	3,316
16	Rancho Cucamonga High Rancho Cucamonga · High · Grades 9–12	Public	3,221	57.0 Top 50%	52% Math proficiency	3,221
17	Berkeley High Berkeley · High · Grades 9–12	Public	3,218	69.6 Top 25%	52% Math proficiency	3,218
18	Quartz Hill High Quartz Hill · High · Grades 9–12	Public	3,175	36.0 Lower 50%	20% Math proficiency	3,175
19	Fountain Valley High Fountain Valley · High · Grades 9–12	Public	3,171	64.0 Top 50%	68% Math proficiency	3,171
20	Birmingham Community Charter High Lake Balboa · High · Grades 9–12	Charter	3,162	37.3 Lower 50%	33% Math proficiency	3,162
21	Santa Maria High Santa Maria · High · Grades 9–12	Public	3,143	24.6 Lower 50%	24% Math proficiency	3,143
22	Chaparral High Temecula · High · Grades 9–12	Public	3,136	60.2 Top 50%	50% Math proficiency	3,136
23	Chaffey High Ontario · High · Grades 9–12	Public	3,127	24.8 Lower 50%	20% Math proficiency	3,127
24	Clovis East High Clovis · High · Grades 9–12	Public	3,113	54.1 Top 50%	45% Math proficiency	3,113
25	James Logan High Union City · High · Grades 9–12	Public	3,096	53.1 Top 50%	44% Math proficiency	3,096
26	Pioneer Valley High Santa Maria · High · Grades 9–12	Public	3,080	36.1 Lower 50%	28% Math proficiency	3,080
27	Bakersfield High Bakersfield · High · Grades 9–12	Public	3,069	25.4 Lower 50%	19% Math proficiency	3,069
28	San Marcos High San Marcos · High · Grades 9–12	Public	3,067	59.0 Top 50%	44% Math proficiency	3,067
29	El Camino Real Charter High Woodland Hills · High · Grades 9–12	Charter	3,046	51.1 Top 50%	41% Math proficiency	3,046
30	Dougherty Valley High San Ramon · High · Grades 9–12	Public	3,039	82.7 Top 10%	87% Math proficiency	3,039
31	Assurance Learning Academy Lancaster · High · Grades 8–12	Charter	3,014	7.2 Lower 50%	2% Math proficiency	3,014
32	Great Oak High Temecula · High · Grades 9–12	Public	2,946	69.5 Top 25%	56% Math proficiency	2,946
33	Arcadia High Arcadia · High · Grades 9–12	Public	2,939	69.7 Top 25%	66% Math proficiency	2,939
34	Milpitas High Milpitas · High · Grades 9–12	Public	2,926	65.6 Top 50%	62% Math proficiency	2,926
35	Redondo Union High Redondo Beach · High · Grades 9–12	Public	2,921	72.1 Top 25%	59% Math proficiency	2,921
36	Palisades Charter High Pacific Palisades · High · Grades 9–12	Charter	2,920	66.5 Top 25%	46% Math proficiency	2,920
37	Los Alamitos High Los Alamitos · High · Grades 9–12	Public	2,915	71.8 Top 25%	57% Math proficiency	2,915
38	Folsom High Folsom · High · Grades 9–12	Public	2,901	74.1 Top 25%	65% Math proficiency	2,901
39	California High San Ramon · High · Grades 9–12	Public	2,894	72.9 Top 25%	61% Math proficiency	2,894
40	Castro Valley High Castro Valley · High · Grades 9–12	Public	2,874	61.0 Top 50%	59% Math proficiency	2,874
41	Sunnyside High Fresno · High · Grades 9–12	Public	2,858	24.7 Lower 50%	16% Math proficiency	2,858
42	Liberty High Brentwood · High · Grades 9–12	Public	2,836	58.0 Top 50%	38% Math proficiency	2,836
43	Alta Vista Innovation High Hesperia · High · Grades 9–12	Charter	2,812	6.1 Lower 50%	2% Math proficiency	2,812
44	Lincoln High Stockton · High · Grades 9–12	Public	2,801	43.2 Lower 50%	33% Math proficiency	2,801
45	Upland High Upland · High · Grades 9–12	Public	2,797	35.8 Lower 50%	32% Math proficiency	2,797
46	Clovis High Clovis · High · Grades 9–12	Public	2,779	59.8 Top 50%	49% Math proficiency	2,779
47	Arnold O. Beckman High Irvine · High · Grades 9–12	Public	2,776	62.0 Top 50%	62% Math proficiency	2,776
48	Dublin High Dublin · High · Grades 9–12	Public	2,771	72.8 Top 25%	66% Math proficiency	2,771
49	Los Osos High Rancho Cucamonga · High · Grades 9–12	Public	2,759	63.9 Top 50%	58% Math proficiency	2,759
50	Yucaipa High Yucaipa · High · Grades 9–12	Public	2,755	43.3 Lower 50%	34% Math proficiency	2,755
51	Mission Hills High San Marcos · High · Grades 9–12	Public	2,751	48.3 Lower 50%	36% Math proficiency	2,751
52	Chino Hills High Chino Hills · High · Grades 9–12	Public	2,748	53.2 Top 50%	50% Math proficiency	2,748
53	Cajon High San Bernardino · High · Grades 9–12	Public	2,748	26.5 Lower 50%	24% Math proficiency	2,748
54	Calexico High Calexico · High · Grades 9–12	Public	2,746	29.8 Lower 50%	25% Math proficiency	2,746
55	Alisal High Salinas · High · Grades 9–12	Public	2,742	18.8 Lower 50%	20% Math proficiency	2,742
56	San Clemente High San Clemente · High · Grades 9–12	Public	2,740	59.7 Top 50%	51% Math proficiency	2,740
57	Temecula Valley High Temecula · High · Grades 9–12	Public	2,739	61.3 Top 50%	47% Math proficiency	2,739
58	Summit High Fontana · High · Grades 9–12	Public	2,725	38.9 Lower 50%	30% Math proficiency	2,725
59	San Diego Workforce Innovation High National City · High · Grades 9–12	Charter	2,722	8.4 Lower 50%	2% Math proficiency	2,722
60	Grover Cleveland Charter High Reseda · High · Grades 9–12	Charter	2,719	45.9 Lower 50%	42% Math proficiency	2,719
61	Centennial High Corona · High · Grades 9–12	Public	2,712	43.4 Lower 50%	40% Math proficiency	2,712
62	Highland High Palmdale · High · Grades 9–12	Public	2,706	18.9 Lower 50%	12% Math proficiency	2,706
63	Evergreen Valley High San Jose · High · Grades 9–12	Public	2,703	73.6 Top 25%	71% Math proficiency	2,703
64	Valley View High Moreno Valley · High · Grades 9–12	Public	2,699	27.4 Lower 50%	23% Math proficiency	2,699
65	Martin Luther King Jr. High Riverside · High · Grades 9–12	Public	2,699	57.4 Top 50%	54% Math proficiency	2,699
66	Portola High Irvine · High · Grades 9–12	Public	2,693	72.2 Top 25%	69% Math proficiency	2,693
67	Arroyo Valley High San Bernardino · High · Grades 9–12	Public	2,692	18.5 Lower 50%	20% Math proficiency	2,692
68	Lancaster High Lancaster · High · Grades 9–12	Public	2,688	21.8 Lower 50%	13% Math proficiency	2,688
69	Cypress High Cypress · High · Grades 9–12	Public	2,685	54.2 Top 50%	48% Math proficiency	2,685
70	Pacifica High Oxnard · High · Grades 9–12	Public	2,675	21.3 Lower 50%	20% Math proficiency	2,675
71	Anaheim High Anaheim · High · Grades 9–12	Public	2,667	17.5 Lower 50%	15% Math proficiency	2,667
72	Arvin High Arvin · High · Grades 9–12	Public	2,653	19.0 Lower 50%	13% Math proficiency	2,653
73	Franklin High Elk Grove · High · Grades 9–12	Public	2,650	63.1 Top 50%	57% Math proficiency	2,650
74	Huntington Beach High Huntington Beach · High · Grades 9–12	Public	2,645	69.3 Top 25%	60% Math proficiency	2,645
75	San Juan Hills High San Juan Capistrano · High · Grades 9–12	Public	2,641	64.2 Top 50%	49% Math proficiency	2,641
76	Eastside High Lancaster · High · Grades 9–12	Public	2,631	16.2 Lower 50%	7% Math proficiency	2,631
77	Crescenta Valley High La Crescenta · High · Grades 9–12	Public	2,624	62.9 Top 50%	58% Math proficiency	2,624
78	Rialto High Rialto · High · Grades 9–12	Public	2,623	28.5 Lower 50%	31% Math proficiency	2,623
79	American High Fremont · High · Grades 9–12	Public	2,618	75.3 Top 25%	70% Math proficiency	2,618
80	Santa Monica High Santa Monica · High · Grades 9–12	Public	2,588	68.4 Top 25%	56% Math proficiency	2,588
81	Amador Valley High Pleasanton · High · Grades 9–12	Public	2,583	76.6 Top 25%	70% Math proficiency	2,583
82	Ridgeview High Bakersfield · High · Grades 9–12	Public	2,575	31.1 Lower 50%	22% Math proficiency	2,575
83	Lowell High San Francisco · High · Grades 9–12	Public	2,571	74.1 Top 25%	83% Math proficiency	2,571
84	C. K. McClatchy High Sacramento · High · Grades 9–12	Public	2,569	39.0 Lower 50%	34% Math proficiency	2,569
85	Heritage High Brentwood · High · Grades 9–12	Public	2,566	72.3 Top 25%	55% Math proficiency	2,566
86	Aliso Niguel High Aliso Viejo · High · Grades 9–12	Public	2,563	66.5 Top 25%	54% Math proficiency	2,563
87	Diamond Bar High Diamond Bar · High · Grades 9–12	Public	2,563	74.3 Top 25%	73% Math proficiency	2,563
88	Del Norte High San Diego · High · Grades 9–12	Public	2,557	80.1 Top 10%	81% Math proficiency	2,557
89	Eastlake High Chula Vista · High · Grades 9–12	Public	2,557	65.7 Top 50%	47% Math proficiency	2,557
90	Helix High La Mesa · High · Grades 9–12	Charter	2,554	60.5 Top 50%	72% Math proficiency	2,554
91	Buchanan High Clovis · High · Grades 9–12	Public	2,551	69.3 Top 25%	55% Math proficiency	2,551
92	Ruben S. Ayala High Chino Hills · High · Grades 9–12	Public	2,541	48.7 Lower 50%	43% Math proficiency	2,541
93	Liberty High Winchester · High · Grades 9–12	Public	2,537	30.9 Lower 50%	53.4% Free/reduced-price lunch	2,537
94	Pleasant Grove High Elk Grove · High · Grades 9–12	Public	2,536	70.2 Top 25%	66% Math proficiency	2,536
95	Torrey Pines High San Diego · High · Grades 9–12	Public	2,536	72.0 Top 25%	62% Math proficiency	2,536
96	Fontana High Fontana · High · Grades 9–12	Public	2,534	29.2 Lower 50%	24% Math proficiency	2,534
97	Highland High Bakersfield · High · Grades 9–12	Public	2,530	30.8 Lower 50%	23% Math proficiency	2,530
98	Westminster High Westminster · High · Grades 9–12	Public	2,529	42.0 Lower 50%	39% Math proficiency	2,529
99	Montclair High Montclair · High · Grades 9–12	Public	2,515	38.4 Lower 50%	35% Math proficiency	2,515
100	San Leandro High San Leandro · High · Grades 9–12	Public	2,510	29.0 Lower 50%	19% Math proficiency	2,510

Eleanor Roosevelt High in Eastvale leads the 2025 list of largest schools in California with Enrollment 4,353. Of the 100 schools shown, 90 are public, 10 are charter.

Use the rankings to build a shortlist, then visit the schools and ask how they support students at your child's level.

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Frequently asked questions

What is the best largest school in California?

Eleanor Roosevelt High in Eastvale ranks first among largest schools in California with Enrollment 4,353 (Enrollment: 4,353).

How are largest schools in California 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.