Lowest Student–Teacher Ratio in Pomona Unified (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; 33 schools in Pomona Unified, 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	Marshall Middle Pomona · Middle · Grades 6–8	Public	15.6	22.5 Lower 50%	18% Math proficiency	249
2	San Jose Elementary Pomona · Elementary · Grades K–8	Public	17.0	21.6 Lower 50%	27% Math proficiency	511
3	La Verne Science and Technology Charter Pomona · Elementary · Grades K–6	Charter	18.0	23.4 Lower 50%	27% Math proficiency	270
4	Pomona High Pomona · High · Grades 9–12	Public	18.1	21.1 Lower 50%	17% Math proficiency	993
5	Fremont Academy of Engineering and Design Pomona · High · Grades 7–12	Public	18.7	15.7 Lower 50%	14% Math proficiency	597
6	Kellogg Polytechnic Elementary Pomona · Elementary · Grades K–6	Public	18.9	21.3 Lower 50%	27% Math proficiency	302
7	Decker Elementary Pomona · Elementary · Grades K–6	Public	19.0	23.0 Lower 50%	26% Math proficiency	437
8	Armstrong Elementary Diamond Bar · Elementary · Grades K–6	Public	19.3	49.8 Lower 50%	42% Math proficiency	251
9	Harrison Elementary Pomona · Elementary · Grades K–8	Public	19.3	19.5 Lower 50%	28% Math proficiency	328
10	Lexington Elementary Pomona · Elementary · Grades K–8	Public	19.9	29.9 Lower 50%	45% Math proficiency	537
11	Lincoln Elementary Pomona · Elementary · Grades K–6	Public	20.3	18.6 Lower 50%	27% Math proficiency	345
12	Ganesha High Pomona · High · Grades 9–12	Public	20.3	17.9 Lower 50%	11% Math proficiency	895
13	Ranch Hills Elementary Pomona · Elementary · Grades K–6	Public	20.4	54.2 Top 50%	54% Math proficiency	449
14	Philadelphia Elementary Pomona · Elementary · Grades K–6	Public	20.6	18.9 Lower 50%	23% Math proficiency	535
15	Garey High Pomona · High · Grades 9–12	Public	21.2	17.8 Lower 50%	17% Math proficiency	1,567
16	Simons Middle Pomona · Middle · Grades 6–8	Public	21.4	20.1 Lower 50%	21% Math proficiency	578
17	Alcott Elementary Pomona · Elementary · Grades K–6	Public	21.6	15.4 Lower 50%	23% Math proficiency	606
18	Barfield Elementary Pomona · Elementary · Grades K–6	Public	21.7	13.4 Lower 50%	17% Math proficiency	282
19	Vejar Elementary Pomona · Elementary · Grades K–8	Public	21.8	14.9 Lower 50%	23% Math proficiency	741
20	Arroyo Elementary Pomona · Elementary · Grades K–6	Public	21.8	12.6 Lower 50%	22% Math proficiency	479
21	Allison Elementary Pomona · Elementary · Grades K–6	Public	22.5	25.4 Lower 50%	37% Math proficiency	427
22	Madison Elementary Pomona · Elementary · Grades K–6	Public	22.5	17.4 Lower 50%	29% Math proficiency	382
23	Kingsley Elementary Pomona · Elementary · Grades K–5	Public	22.6	13.0 Lower 50%	18% Math proficiency	656
24	Diamond Ranch High Pomona · High · Grades 9–12	Public	22.7	42.6 Lower 50%	36% Math proficiency	1,542
25	Emerson Middle Pomona · Middle · Grades 6–8	Public	22.9	14.6 Lower 50%	15% Math proficiency	664
26	Roosevelt Elementary Pomona · Elementary · Grades K–6	Public	23.0	24.6 Lower 50%	36% Math proficiency	529
27	Washington Elementary Pomona · Elementary · Grades K–5	Public	23.0	14.7 Lower 50%	27% Math proficiency	645
28	Lopez Elementary Pomona · Elementary · Grades K–6	Public	23.2	17.9 Lower 50%	26% Math proficiency	394
29	Westmont Elementary Pomona · Elementary · Grades K–6	Public	23.4	26.5 Lower 50%	37% Math proficiency	327
30	Pantera Elementary Diamond Bar · Elementary · Grades K–6	Public	24.4	69.7 Top 25%	72% Math proficiency	512
31	Lorbeer Middle Diamond Bar · Middle · Grades 7–8	Public	24.6	37.0 Lower 50%	36% Math proficiency	688
32	Cortez Elementary Pomona · Elementary · Grades K–8	Public	25.3	29.1 Lower 50%	39% Math proficiency	607
33	Golden Springs Elementary Diamond Bar · Elementary · Grades K–6	Public	25.9	46.1 Lower 50%	52% Math proficiency	388

Marshall Middle in Pomona leads the 2025 list of lowest student–teacher ratio in Pomona Unified with Students per teacher 15.6. Of the 33 schools shown, 32 are public, 1 are charter.

For the full picture see the wider California lowest student–teacher ratio rankings, every school on the Pomona Unified 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 Pomona Unified?

Marshall Middle in Pomona, California ranks first among lowest student–teacher ratio in Pomona Unified with Students per teacher 15.6 (Enrollment: 249).

How are lowest student–teacher ratio in Pomona Unified 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.