Lowest Student–Teacher Ratio in Petaluma (2025)

Schools with the fewest students per FTE teacher, among schools with at least 100 students. 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.

1
32
Cinnabar CharterPetaluma · Charter ElementaryStudents per teacher: 17.3
2
49
Two Rock ElementaryPetaluma · Public ElementaryStudents per teacher: 19.3
3
34
Valley Vista ElementaryPetaluma · Public ElementaryStudents per teacher: 19.4
4
51
Petaluma Junior HighPetaluma · Public MiddleStudents per teacher: 19.7
5
32
Miwok Valley Elementary CharterPetaluma · Charter ElementaryStudents per teacher: 20.6
6
56
Kenilworth Junior HighPetaluma · Public MiddleStudents per teacher: 20.8
7
58
Petaluma HighPetaluma · Public HighStudents per teacher: 21.3
8
57
Casa Grande HighPetaluma · Public HighStudents per teacher: 21.8
9
69
Corona Creek ElementaryPetaluma · Public ElementaryStudents per teacher: 22.4
10
78
Meadow ElementaryPetaluma · Public ElementaryStudents per teacher: 22.6
11
67
Live Oak CharterPetaluma · Charter ElementaryStudents per teacher: 22.6
12
55
McNear ElementaryPetaluma · Public ElementaryStudents per teacher: 22.9
13
84
Liberty ElementaryPetaluma · Charter ElementaryStudents per teacher: 23.1
14
81
Wilson ElementaryPetaluma · Public ElementaryStudents per teacher: 23.5
15
16
McDowell ElementaryPetaluma · Public ElementaryStudents per teacher: 23.5
16
73
Dunham CharterPetaluma · Charter ElementaryStudents per teacher: 23.7
17
74
Grant ElementaryPetaluma · Public ElementaryStudents per teacher: 24.1
18
66
McKinley ElementaryPetaluma · Public ElementaryStudents per teacher: 24.5
19
45
La Tercera ElementaryPetaluma · Public ElementaryStudents per teacher: 24.6
20
69
Sonoma Mountain ElementaryPetaluma · Charter ElementaryStudents per teacher: 24.8
21
48
Loma Vista Immersion AcademyPetaluma · Charter ElementaryStudents per teacher: 25.1
22
59
Old Adobe Elementary CharterPetaluma · Charter ElementaryStudents per teacher: 25.3
23
53
Mary Collins Charter School at Cherry ValleyPetaluma · Charter ElementaryStudents per teacher: 27.4
24
86
Petaluma Accelerated CharterPetaluma · Charter MiddleStudents per teacher: 28.8
25
42
River Montessori Elementary CharterPetaluma · Charter ElementaryStudents per teacher: 28.8

#	School	Sector	Students per teacher	Success Index (US)	Key result	Students
1	Cinnabar Charter Petaluma · Elementary · Grades K–8	Charter	17.3	31.9 Lower 50%	22% Math proficiency	156
2	Two Rock Elementary Petaluma · Elementary · Grades K–6	Public	19.3	49.2 Lower 50%	42% Math proficiency	135
3	Valley Vista Elementary Petaluma · Elementary · Grades K–6	Public	19.4	34.0 Lower 50%	32% Math proficiency	155
4	Petaluma Junior High Petaluma · Middle · Grades 7–8	Public	19.7	51.0 Top 50%	40% Math proficiency	454
5	Miwok Valley Elementary Charter Petaluma · Elementary · Grades K–6	Charter	20.6	31.7 Lower 50%	32% Math proficiency	288
6	Kenilworth Junior High Petaluma · Middle · Grades 7–8	Public	20.8	55.7 Top 50%	47% Math proficiency	812
7	Petaluma High Petaluma · High · Grades 9–12	Public	21.3	58.1 Top 50%	43% Math proficiency	1,193
8	Casa Grande High Petaluma · High · Grades 9–12	Public	21.8	56.6 Top 50%	43% Math proficiency	1,653
9	Corona Creek Elementary Petaluma · Elementary · Grades K–6	Public	22.4	68.7 Top 25%	59% Math proficiency	403
10	Meadow Elementary Petaluma · Elementary · Grades K–6	Public	22.6	77.7 Top 25%	69% Math proficiency	384
11	Live Oak Charter Petaluma · Elementary · Grades K–8	Charter	22.6	66.6 Top 50%	57% Math proficiency	271
12	McNear Elementary Petaluma · Elementary · Grades K–6	Public	22.9	55.3 Top 50%	51% Math proficiency	343
13	Liberty Elementary Petaluma · Elementary · Grades 1–6	Charter	23.1	83.6 Top 10%	82% Math proficiency	162
14	Wilson Elementary Petaluma · Elementary · Grades K–6	Public	23.5	80.6 Top 10%	77% Math proficiency	235
15	McDowell Elementary Petaluma · Elementary · Grades K–6	Public	23.5	15.6 Lower 50%	27% Math proficiency	329
16	Dunham Charter Petaluma · Elementary · Grades K–6	Charter	23.7	72.7 Top 25%	62% Math proficiency	166
17	Grant Elementary Petaluma · Elementary · Grades K–6	Public	24.1	73.6 Top 25%	70% Math proficiency	386
18	McKinley Elementary Petaluma · Elementary · Grades K–6	Public	24.5	65.5 Top 50%	67% Math proficiency	368
19	La Tercera Elementary Petaluma · Elementary · Grades K–6	Public	24.6	45.4 Lower 50%	42% Math proficiency	295
20	Sonoma Mountain Elementary Petaluma · Elementary · Grades K–6	Charter	24.8	68.8 Top 25%	65% Math proficiency	422
21	Loma Vista Immersion Academy Petaluma · Elementary · Grades K–6	Charter	25.1	48.2 Lower 50%	52% Math proficiency	451
22	Old Adobe Elementary Charter Petaluma · Elementary · Grades K–6	Charter	25.3	59.4 Top 50%	52% Math proficiency	278
23	Mary Collins Charter School at Cherry Valley Petaluma · Elementary · Grades K–8	Charter	27.4	52.5 Top 50%	38% Math proficiency	494
24	Petaluma Accelerated Charter Petaluma · Middle · Grades 7–8	Charter	28.8	85.5 Top 5%	97.5% Math proficiency	115
25	River Montessori Elementary Charter Petaluma · Elementary · Grades K–6	Charter	28.8	41.6 Lower 50%	17% Math proficiency	144

Cinnabar Charter in Petaluma leads the 2025 list of lowest student–teacher ratio in Petaluma with Students per teacher 17.3. Of the 25 schools shown, 14 are public, 11 are charter.

For the full picture see the wider California lowest student–teacher ratio 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 ratio school in Petaluma?

Cinnabar Charter in Petaluma, California ranks first among lowest student–teacher ratio in Petaluma with Students per teacher 17.3 (Enrollment: 156).

How are lowest student–teacher ratio in Petaluma ranked?

Schools with the fewest students per FTE teacher, among schools with at least 100 students. 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.