Largest Schools in Simi Valley Unified (2025)

Schools with the highest enrollment. Ranked by the Success Index (US) from official American data; 25 schools in Simi Valley Unified, California. Rank positions shown on each profile are within United States and California.

#	School	Sector	Enrollment	Success Index (US)	Key result	Students
1	Simi Valley High Simi Valley · High · Grades 9–12	Public	1,910	49.6 Top 50%	31% Math proficiency	1,910
2	Royal High Simi Valley · High · Grades 9–12	Public	1,835	44.8 Lower 50%	29% Math proficiency	1,835
3	Valley View Middle Simi Valley · Middle · Grades 6–8	Public	1,329	47.7 Lower 50%	43% Math proficiency	1,329
4	Hillside Middle Simi Valley · Middle · Grades 6–8	Public	1,138	50.6 Top 50%	43% Math proficiency	1,138
5	Santa Susana High Simi Valley · High · Grades 9–12	Public	1,033	70.7 Top 25%	53% Math proficiency	1,033
6	Sinaloa Middle Simi Valley · Middle · Grades 6–8	Public	843	42.2 Lower 50%	41% Math proficiency	843
7	Vista Elementary Simi Valley · Elementary · Grades K–6	Public	567	75.4 Top 25%	76% Math proficiency	567
8	Hollow Hills Elementary Simi Valley · Elementary · Grades K–6	Public	560	65.6 Top 50%	62% Math proficiency	560
9	Township Elementary Simi Valley · Elementary · Grades K–6	Public	521	46.3 Lower 50%	43% Math proficiency	521
10	Berylwood Elementary Simi Valley · Elementary · Grades K–6	Public	457	21.4 Lower 50%	27% Math proficiency	457
11	Atherwood Elementary Simi Valley · Elementary · Grades K–6	Public	456	63.7 Top 50%	57% Math proficiency	456
12	Wood Ranch Elementary Simi Valley · Elementary · Grades K–6	Public	452	57.9 Top 50%	57% Math proficiency	452
13	Big Springs Elementary Simi Valley · Elementary · Grades K–6	Public	441	65.5 Top 50%	62% Math proficiency	441
14	Mountain View Elementary Simi Valley · Elementary · Grades K–6	Public	401	32.9 Lower 50%	37% Math proficiency	401
15	Sycamore Elementary Simi Valley · Elementary · Grades K–6	Public	359	41.5 Lower 50%	42% Math proficiency	359
16	White Oak Elementary Simi Valley · Elementary · Grades K–6	Public	352	54.5 Top 50%	49% Math proficiency	352
17	Park View Elementary Simi Valley · Elementary · Grades K–6	Public	319	15.7 Lower 50%	21% Math proficiency	319
18	Santa Susana Elementary Simi Valley · Elementary · Grades K–6	Public	312	21.9 Lower 50%	27% Math proficiency	312
19	Katherine Elementary Simi Valley · Elementary · Grades K–6	Public	300	41.6 Lower 50%	42% Math proficiency	300
20	Garden Grove Elementary Simi Valley · Elementary · Grades K–6	Public	283	41.5 Lower 50%	42% Math proficiency	283
21	Madera Elementary Simi Valley · Elementary · Grades K–6	Public	264	52.5 Top 50%	47% Math proficiency	264
22	Arroyo Elementary Simi Valley · Elementary · Grades K–6	Public	264	25.8 Lower 50%	17% Math proficiency	264
23	Crestview Elementary Simi Valley · Elementary · Grades K–6	Public	248	33.1 Lower 50%	32% Math proficiency	248
24	Knolls Elementary Simi Valley · Elementary · Grades K–6	Public	212	34.6 Lower 50%	27% Math proficiency	212
25	Justin Elementary Simi Valley · Elementary · Grades K–6	Public	103	66.5 Top 50%	44.7% Free/reduced-price lunch	103

Simi Valley High in Simi Valley leads the 2025 list of largest schools in Simi Valley Unified with Enrollment 1,910. Of the 25 schools shown, 25 are public.

For the full picture see the wider California largest schools rankings, every school on the Simi Valley Unified page, or the comparison tool to put a shortlist side by side.

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Frequently asked questions

What is the best largest school in Simi Valley Unified?

Simi Valley High in Simi Valley, California ranks first among largest schools in Simi Valley Unified with Enrollment 1,910 (Enrollment: 1,910).

How are largest schools in Simi Valley 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.