Largest Schools in Tustin Unified (2025)

Schools with the highest enrollment. Ranked by the Success Index (US) from official American data; 26 schools in Tustin Unified, California. Rank positions shown on each profile are within United States and California.

#	School	Sector	Enrollment	Success Index (US)	Key result	Students
1	Arnold O. Beckman High Irvine · High · Grades 9–12	Public	2,776	62.0 Top 50%	62% Math proficiency	2,776
2	Foothill High Santa Ana · High · Grades 9–12	Public	2,126	59.3 Top 50%	52% Math proficiency	2,126
3	Tustin High Tustin · High · Grades 9–12	Public	1,627	30.6 Lower 50%	29% Math proficiency	1,627
4	Orchard Hills Irvine · Elementary · Grades K–8	Public	1,373	78.2 Top 25%	78% Math proficiency	1,373
5	Sycamore Magnet Academy Tustin · Elementary · Grades K–8	Public	1,085	13.1 Lower 50%	18% Math proficiency	1,085
6	Pioneer Middle Tustin · Middle · Grades 6–8	Public	971	68.6 Top 25%	66% Math proficiency	971
7	Legacy Magnet Academy Tustin · High · Grades 6–12	Public	964	49.4 Lower 50%	32.5% Free/reduced-price lunch	964
8	Hewes Middle Santa Ana · Middle · Grades 6–8	Public	929	66.7 Top 50%	64% Math proficiency	929
9	Hicks Canyon Elementary Irvine · Elementary · Grades K–5	Public	830	72.5 Top 25%	75% Math proficiency	830
10	Tustin Memorial Elementary Santa Ana · Elementary · Grades K–5	Public	613	80.4 Top 10%	84% Math proficiency	613
11	Arroyo Elementary Santa Ana · Elementary · Grades K–5	Public	585	75.3 Top 25%	75% Math proficiency	585
12	Columbus Tustin Middle Tustin · Middle · Grades 6–8	Public	583	33.7 Lower 50%	35% Math proficiency	583
13	Heritage Elementary Tustin · Elementary · Grades K–5	Public	567	67.8 Top 50%	62% Math proficiency	567
14	C. E. Utt Middle Tustin · Middle · Grades 6–8	Public	554	34.1 Lower 50%	34% Math proficiency	554
15	Myford Elementary Irvine · Elementary · Grades K–5	Public	542	72.3 Top 25%	76% Math proficiency	542
16	Tustin Ranch Elementary Tustin · Elementary · Grades K–5	Public	520	52.6 Top 50%	59% Math proficiency	520
17	Robert Heideman Elementary Tustin · Elementary · Grades K–5	Public	502	9.2 Lower 50%	19% Math proficiency	502
18	W. R. Nelson Elementary Tustin · Elementary · Grades K–5	Public	460	21.5 Lower 50%	28% Math proficiency	460
19	Helen Estock Elementary Tustin · Elementary · Grades K–5	Public	456	9.4 Lower 50%	20% Math proficiency	456
20	Red Hill Elementary Santa Ana · Elementary · Grades K–5	Public	436	61.1 Top 50%	54% Math proficiency	436
21	Loma Vista Elementary Santa Ana · Elementary · Grades K–5	Public	433	43.1 Lower 50%	47% Math proficiency	433
22	Benjamin F. Beswick Elementary Tustin · Elementary · Grades K–5	Public	426	25.5 Lower 50%	37% Math proficiency	426
23	Peters Canyon Elementary Tustin · Elementary · Grades K–5	Public	399	72.8 Top 25%	72% Math proficiency	399
24	Guin Foss Elementary Santa Ana · Elementary · Grades K–5	Public	395	57.6 Top 50%	61% Math proficiency	395
25	Ladera Elementary Tustin · Elementary · Grades K–5	Public	345	71.6 Top 25%	72% Math proficiency	345
26	Barbara Benson Elementary Tustin · Elementary · Grades K–5	Public	313	33.3 Lower 50%	42% Math proficiency	313

Arnold O. Beckman High in Irvine leads the 2025 list of largest schools in Tustin Unified with Enrollment 2,776. Of the 26 schools shown, 26 are public.

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

Arnold O. Beckman High in Irvine, California ranks first among largest schools in Tustin Unified with Enrollment 2,776 (Enrollment: 2,776).

How are largest schools in Tustin 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.