Largest Schools in Idaho Falls (2025)

Schools with the highest enrollment. Ranked by the Success Index (US) from official American data; 35 schools in Idaho Falls, Idaho. Rank positions shown on each profile are within United States and Idaho.

#	School	Sector	Enrollment	Success Index (US)	Key result	Students
1	Thunder Ridge High School Idaho Falls · High · Grades 9–12	Public	1,693	49.7 Top 50%	28% Math proficiency	1,693
2	Skyline Senior High School Idaho Falls · High · Grades 9–12	Public	1,336	39.6 Lower 50%	25% Math proficiency	1,336
3	Idaho Falls Senior High School Idaho Falls · High · Grades 9–12	Public	1,298	48.3 Lower 50%	30% Math proficiency	1,298
4	Bonneville High School Idaho Falls · High · Grades 9–12	Public	1,176	50.6 Top 50%	30% Math proficiency	1,176
5	Black Canyon Middle School Idaho Falls · Middle · Grades 7–8	Public	810	52.1 Top 50%	35.2% Free/reduced-price lunch	810
6	Taylorview Middle School Idaho Falls · Middle · Grades 7–8	Public	753	53.2 Top 50%	41% Math proficiency	753
7	Eagle Rock Middle School Idaho Falls · Middle · Grades 7–8	Public	704	48.5 Lower 50%	40% Math proficiency	704
8	Discovery Elementary School Idaho Falls · Elementary · Grades PK–6	Public	607	66.2 Top 50%	62% Math proficiency	607
9	Sandcreek Middle School Idaho Falls · Middle · Grades 7–8	Public	592	59.7 Top 50%	44% Math proficiency	592
10	Longfellow Elementary School Idaho Falls · Elementary · Grades PK–6	Public	577	52.9 Top 50%	47% Math proficiency	577
11	Alturas International Academy Idaho Falls · Elementary · Grades K–5	Charter	572	58.0 Top 50%	48% Math proficiency	572
12	Sunnyside Elementary School Idaho Falls · Elementary · Grades PK–6	Public	568	66.9 Top 50%	58% Math proficiency	568
13	Edgemont Gardens Elementary School Idaho Falls · Elementary · Grades PK–6	Public	560	42.6 Lower 50%	36% Math proficiency	560
14	Cloverdale Elementary School Idaho Falls · Elementary · Grades PK–6	Public	542	40.7 Lower 50%	37% Math proficiency	542
15	Rocky Mountain Middle School Idaho Falls · Middle · Grades 7–8	Public	524	53.0 Top 50%	37% Math proficiency	524
16	Ethel Boyes Elementary School Idaho Falls · Elementary · Grades PK–6	Public	516	35.0 Lower 50%	38% Math proficiency	516
17	Westside Elementary School Idaho Falls · Elementary · Grades PK–6	Public	483	67.7 Top 50%	66% Math proficiency	483
18	Bridgewater Elementary School Idaho Falls · Elementary · Grades PK–6	Public	480	37.4 Lower 50%	29% Math proficiency	480
19	Summit Hills Elementary School Idaho Falls · Elementary · Grades K–6	Public	471	56.0 Top 50%	47% Math proficiency	471
20	Alturas Preparatory Academy Idaho Falls · High · Grades 6–12	Charter	463	65.4 Top 50%	26.8% Free/reduced-price lunch	463
21	Fox Hollow Elementary School Idaho Falls · Elementary · Grades PK–6	Public	458	34.0 Lower 50%	39% Math proficiency	458
22	Ucon Elementary School Idaho Falls · Elementary · Grades PK–6	Public	447	58.7 Top 50%	55% Math proficiency	447
23	Falls Valley Elementary School Idaho Falls · Elementary · Grades PK–6	Public	443	33.7 Lower 50%	30% Math proficiency	443
24	Dora Erickson Elementary School Idaho Falls · Elementary · Grades PK–6	Public	436	24.3 Lower 50%	28% Math proficiency	436
25	Linden Park Elementary School Idaho Falls · Elementary · Grades PK–6	Public	404	23.2 Lower 50%	30% Math proficiency	404
26	Compass Academy Idaho Falls · High · Grades 9–12	Public	393	51.8 Top 50%	32% Math proficiency	393
27	Hawthorne Elementary School Idaho Falls · Elementary · Grades PK–6	Public	383	20.0 Lower 50%	27% Math proficiency	383
28	Tiebreaker Elementary School Idaho Falls · Elementary · Grades PK–6	Public	379	41.0 Lower 50%	42% Math proficiency	379
29	Bonneville Online Elementary Idaho Falls · Elementary · Grades PK–8	Public	375	35.7 Lower 50%	32% Math proficiency	375
30	A H Bush Elementary School Idaho Falls · Elementary · Grades PK–6	Public	315	27.0 Lower 50%	28% Math proficiency	315
31	Fairview Elementary School Idaho Falls · Elementary · Grades PK–6	Public	299	73.4 Top 25%	72% Math proficiency	299
32	Theresa Bunker Elementary School Idaho Falls · Elementary · Grades PK–6	Public	297	30.2 Lower 50%	32% Math proficiency	297
33	Bonneville Online School Idaho Falls · High · Grades 6–12	Public	290	49.6 Top 50%	32% Math proficiency	290
34	Temple View Elementary School Idaho Falls · Elementary · Grades PK–6	Public	275	39.0 Lower 50%	33% Math proficiency	275
35	Praxium Mastery Academy Idaho Falls · High · Grades 6–12	Public	136	66.5 Top 25%	22.1% Free/reduced-price lunch	136

Thunder Ridge High School in Idaho Falls leads the 2025 list of largest schools in Idaho Falls with Enrollment 1,693. Of the 35 schools shown, 33 are public, 2 are charter.

For the full picture see the wider Idaho largest schools rankings, every school on the Idaho Falls 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 Idaho Falls?

Thunder Ridge High School in Idaho Falls, Idaho ranks first among largest schools in Idaho Falls with Enrollment 1,693 (Enrollment: 1,693).

How are largest schools in Idaho Falls 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.