Largest Schools in Rialto Unified (2025)

Schools with the highest enrollment. Ranked by the Success Index (US) from official American data; 27 schools in Rialto Unified, California. Rank positions shown on each profile are within United States and California.

#	School	Sector	Enrollment	Success Index (US)	Key result	Students
1	Rialto High Rialto · High · Grades 9–12	Public	2,623	28.5 Lower 50%	31% Math proficiency	2,623
2	Eisenhower High Rialto · High · Grades 9–12	Public	2,075	19.6 Lower 50%	19% Math proficiency	2,075
3	Wilmer Amina Carter High Rialto · High · Grades 9–12	Public	1,951	33.1 Lower 50%	30% Math proficiency	1,951
4	William G. Jehue Middle Colton · Middle · Grades 6–8	Public	1,444	12.9 Lower 50%	18% Math proficiency	1,444
5	Rialto Middle Rialto · Middle · Grades 6–8	Public	1,017	14.6 Lower 50%	13% Math proficiency	1,017
6	Warren F. Frisbie Middle Rialto · Middle · Grades 6–8	Public	1,000	8.3 Lower 50%	10% Math proficiency	1,000
7	Ethel Kucera Middle Rialto · Middle · Grades 6–8	Public	978	16.9 Lower 50%	17% Math proficiency	978
8	Ben F. Kolb Middle Rialto · Middle · Grades 6–8	Public	917	17.3 Lower 50%	19% Math proficiency	917
9	Charlotte N. Werner Elementary Rialto · Elementary · Grades K–5	Public	739	11.9 Lower 50%	19% Math proficiency	739
10	Nancy R. Kordyak Elementary Fontana · Elementary · Grades K–5	Public	718	38.9 Lower 50%	40% Math proficiency	718
11	Sam V. Curtis Elementary Rialto · Elementary · Grades K–5	Public	702	26.3 Lower 50%	32% Math proficiency	702
12	J.P. Kelley Elementary Rialto · Elementary · Grades K–5	Public	661	20.8 Lower 50%	27% Math proficiency	661
13	Samuel W. Simpson Elementary Rialto · Elementary · Grades K–5	Public	638	38.6 Lower 50%	42% Math proficiency	638
14	George H. Dunn Elementary Rialto · Elementary · Grades K–5	Public	609	13.0 Lower 50%	23% Math proficiency	609
15	Helen L. Dollahan Elementary Rialto · Elementary · Grades K–5	Public	608	28.0 Lower 50%	34% Math proficiency	608
16	Dr. Ernest Garcia Elementary Colton · Elementary · Grades K–5	Public	608	20.3 Lower 50%	32% Math proficiency	608
17	Georgia F. Morris Elementary Colton · Elementary · Grades K–5	Public	604	21.1 Lower 50%	30% Math proficiency	604
18	J. Calvin Boyd Elementary Rialto · Elementary · Grades K–5	Public	569	19.2 Lower 50%	24% Math proficiency	569
19	Levi Bemis Elementary Rialto · Elementary · Grades K–5	Public	566	12.1 Lower 50%	15% Math proficiency	566
20	Merle S. Casey Elementary Rialto · Elementary · Grades K–5	Public	563	11.0 Lower 50%	21% Math proficiency	563
21	W.J.C. Trapp Elementary Rialto · Elementary · Grades K–5	Public	537	44.9 Lower 50%	53% Math proficiency	537
22	A. H. Morgan Elementary Rialto · Elementary · Grades K–5	Public	487	27.3 Lower 50%	34% Math proficiency	487
23	Lena M. Preston Elementary Rialto · Elementary · Grades K–5	Public	471	12.8 Lower 50%	18% Math proficiency	471
24	Winn A. Myers Elementary Rialto · Elementary · Grades K–5	Public	461	19.5 Lower 50%	30% Math proficiency	461
25	Elizabeth T. Hughbanks Elementary Rialto · Elementary · Grades K–5	Public	436	25.5 Lower 50%	27% Math proficiency	436
26	Dr. Edward Fitzgerald Elementary Rialto · Elementary · Grades K–5	Public	414	19.8 Lower 50%	23% Math proficiency	414
27	Lida M. Henry Elementary Rialto · Elementary · Grades K–5	Public	391	17.4 Lower 50%	29% Math proficiency	391

Rialto High in Rialto leads the 2025 list of largest schools in Rialto Unified with Enrollment 2,623. Of the 27 schools shown, 27 are public.

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

Free academic assessment

Is your child on grade level in reading and math?

Success Tutoring offers personalised English and math tutoring from Kindergarten to Grade 12. Start with a free online assessment and a clear plan for the year ahead.

Personalised learning plan mapped to the Australian Curriculum
English & Maths from Kindergarten to Year 12
Flexible memberships, no lock-in contracts
Centres across NSW, VIC, QLD, WA, SA and ACT

Frequently asked questions

What is the best largest school in Rialto Unified?

Rialto High in Rialto, California ranks first among largest schools in Rialto Unified with Enrollment 2,623 (Enrollment: 2,623).

How are largest schools in Rialto 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.