Largest Schools in Petaluma (2025)

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

#	School	Sector	Enrollment	Success Index (US)	Key result	Students
1	Casa Grande High Petaluma · High · Grades 9–12	Public	1,653	56.6 Top 50%	43% Math proficiency	1,653
2	Petaluma High Petaluma · High · Grades 9–12	Public	1,193	58.1 Top 50%	43% Math proficiency	1,193
3	Kenilworth Junior High Petaluma · Middle · Grades 7–8	Public	812	55.7 Top 50%	47% Math proficiency	812
4	Mary Collins Charter School at Cherry Valley Petaluma · Elementary · Grades K–8	Charter	494	52.5 Top 50%	38% Math proficiency	494
5	Petaluma Junior High Petaluma · Middle · Grades 7–8	Public	454	51.0 Top 50%	40% Math proficiency	454
6	Loma Vista Immersion Academy Petaluma · Elementary · Grades K–6	Charter	451	48.2 Lower 50%	52% Math proficiency	451
7	Sonoma Mountain Elementary Petaluma · Elementary · Grades K–6	Charter	422	68.8 Top 25%	65% Math proficiency	422
8	Corona Creek Elementary Petaluma · Elementary · Grades K–6	Public	403	68.7 Top 25%	59% Math proficiency	403
9	Grant Elementary Petaluma · Elementary · Grades K–6	Public	386	73.6 Top 25%	70% Math proficiency	386
10	Meadow Elementary Petaluma · Elementary · Grades K–6	Public	384	77.7 Top 25%	69% Math proficiency	384
11	McKinley Elementary Petaluma · Elementary · Grades K–6	Public	368	65.5 Top 50%	67% Math proficiency	368
12	McNear Elementary Petaluma · Elementary · Grades K–6	Public	343	55.3 Top 50%	51% Math proficiency	343
13	McDowell Elementary Petaluma · Elementary · Grades K–6	Public	329	15.6 Lower 50%	27% Math proficiency	329
14	La Tercera Elementary Petaluma · Elementary · Grades K–6	Public	295	45.4 Lower 50%	42% Math proficiency	295
15	Miwok Valley Elementary Charter Petaluma · Elementary · Grades K–6	Charter	288	31.7 Lower 50%	32% Math proficiency	288
16	Old Adobe Elementary Charter Petaluma · Elementary · Grades K–6	Charter	278	59.4 Top 50%	52% Math proficiency	278
17	Live Oak Charter Petaluma · Elementary · Grades K–8	Charter	271	66.6 Top 50%	57% Math proficiency	271
18	Wilson Elementary Petaluma · Elementary · Grades K–6	Public	235	80.6 Top 10%	77% Math proficiency	235
19	Dunham Charter Petaluma · Elementary · Grades K–6	Charter	166	72.7 Top 25%	62% Math proficiency	166
20	Liberty Elementary Petaluma · Elementary · Grades 1–6	Charter	162	83.6 Top 10%	82% Math proficiency	162
21	Cinnabar Charter Petaluma · Elementary · Grades K–8	Charter	156	31.9 Lower 50%	22% Math proficiency	156
22	Valley Vista Elementary Petaluma · Elementary · Grades K–6	Public	155	34.0 Lower 50%	32% Math proficiency	155
23	River Montessori Elementary Charter Petaluma · Elementary · Grades K–6	Charter	144	41.6 Lower 50%	17% Math proficiency	144
24	Two Rock Elementary Petaluma · Elementary · Grades K–6	Public	135	49.2 Lower 50%	42% Math proficiency	135
25	Petaluma Accelerated Charter Petaluma · Middle · Grades 7–8	Charter	115	85.5 Top 5%	97.5% Math proficiency	115

Casa Grande High in Petaluma leads the 2025 list of largest schools in Petaluma with Enrollment 1,653. Of the 25 schools shown, 14 are public, 11 are charter.

For the full picture see the wider California largest schools rankings, every school on the Petaluma 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 Petaluma?

Casa Grande High in Petaluma, California ranks first among largest schools in Petaluma with Enrollment 1,653 (Enrollment: 1,653).

How are largest schools in Petaluma 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.