Lowest Student–Teacher Ratio in Ontario-Montclair (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; 32 schools in Ontario-Montclair, California. Rank positions shown on each profile are within United States and California.

#	School	Sector	Students per teacher	Success Index (US)	Key result	Students
1	De Anza Middle Ontario · Middle · Grades 7–8	Public	15.9	22.0 Lower 50%	26% Math proficiency	510
2	Vina Danks Middle Ontario · Middle · Grades 7–8	Public	16.5	23.3 Lower 50%	23% Math proficiency	544
3	Montera Elementary Montclair · Elementary · Grades K–6	Public	17.6	22.8 Lower 50%	30% Math proficiency	564
4	Ray Wiltsey Middle Ontario · Middle · Grades 6–8	Public	17.7	20.0 Lower 50%	25% Math proficiency	727
5	El Camino Elementary Ontario · Elementary · Grades K–6	Public	18.3	21.0 Lower 50%	29% Math proficiency	476
6	Serrano Middle Montclair · Middle · Grades 7–8	Public	18.8	40.0 Lower 50%	48% Math proficiency	657
7	Lincoln Elementary Ontario · Elementary · Grades K–6	Public	18.9	26.3 Lower 50%	37% Math proficiency	530
8	Vernon Middle Montclair · Middle · Grades 7–8	Public	19.3	26.9 Lower 50%	29% Math proficiency	580
9	Sultana Elementary Ontario · Elementary · Grades K–6	Public	20.3	33.7 Lower 50%	41% Math proficiency	589
10	Euclid Elementary Ontario · Elementary · Grades K–6	Public	21.2	25.3 Lower 50%	35% Math proficiency	572
11	Moreno Elementary Montclair · Elementary · Grades K–6	Public	21.4	40.2 Lower 50%	46% Math proficiency	428
12	Arroyo Elementary Ontario · Elementary · Grades K–8	Public	21.4	23.1 Lower 50%	29% Math proficiency	493
13	Del Norte Elementary Ontario · Elementary · Grades K–6	Public	21.4	21.2 Lower 50%	30% Math proficiency	428
14	Oaks Middle Ontario · Middle · Grades 7–8	Public	21.5	28.8 Lower 50%	31% Math proficiency	668
15	Mariposa Elementary Ontario · Elementary · Grades K–6	Public	21.5	15.4 Lower 50%	24% Math proficiency	537
16	Elderberry Elementary Ontario · Elementary · Grades K–6	Public	22.7	37.7 Lower 50%	52% Math proficiency	544
17	Berlyn Elementary Ontario · Elementary · Grades K–6	Public	22.8	13.4 Lower 50%	22% Math proficiency	639
18	Corona Elementary Ontario · Elementary · Grades K–6	Public	23.0	25.9 Lower 50%	38% Math proficiency	414
19	Ramona Elementary Montclair · Elementary · Grades K–6	Public	23.2	34.8 Lower 50%	42% Math proficiency	556
20	Richard Haynes Elementary Ontario · Elementary · Grades K–6	Public	23.7	24.9 Lower 50%	34% Math proficiency	641
21	Mission Elementary Ontario · Elementary · Grades K–6	Public	23.8	25.7 Lower 50%	37% Math proficiency	571
22	Vista Grande Elementary Ontario · Elementary · Grades K–6	Public	23.9	42.6 Lower 50%	49% Math proficiency	358
23	Lehigh Elementary Montclair · Elementary · Grades K–6	Public	23.9	26.2 Lower 50%	42% Math proficiency	477
24	Bon View Elementary Ontario · Elementary · Grades K–6	Public	23.9	18.4 Lower 50%	27% Math proficiency	598
25	Howard Elementary Montclair · Elementary · Grades K–6	Public	24.1	37.2 Lower 50%	46% Math proficiency	433
26	Monte Vista Elementary Montclair · Elementary · Grades K–6	Public	24.3	38.8 Lower 50%	47% Math proficiency	535
27	Buena Vista Arts-Integrated Montclair · Elementary · Grades K–6	Public	24.6	44.3 Lower 50%	49% Math proficiency	369
28	Kingsley Elementary Montclair · Elementary · Grades K–6	Public	24.7	26.3 Lower 50%	37% Math proficiency	494
29	Hawthorne Elementary Ontario · Elementary · Grades K–6	Public	25.0	22.9 Lower 50%	29% Math proficiency	549
30	Central Language Academy Ontario · Elementary · Grades K–8	Public	25.4	31.8 Lower 50%	27% Math proficiency	736
31	Vineyard Elementary Ontario · Elementary · Grades K–8	Public	25.5	29.9 Lower 50%	36% Math proficiency	562
32	Edison Elementary Ontario · Elementary · Grades K–8	Public	26.3	54.8 Top 50%	60% Math proficiency	736

De Anza Middle in Ontario leads the 2025 list of lowest student–teacher ratio in Ontario-Montclair with Students per teacher 15.9. Of the 32 schools shown, 32 are public.

For the full picture see the wider California lowest student–teacher ratio rankings, every school on the Ontario-Montclair 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 Ontario-Montclair?

De Anza Middle in Ontario, California ranks first among lowest student–teacher ratio in Ontario-Montclair with Students per teacher 15.9 (Enrollment: 510).

How are lowest student–teacher ratio in Ontario-Montclair 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.