Summary:
Zip code 83401 in Idaho Falls, ID is home to 9 high schools serving 5,349 students across two districts: Bonneville Joint District and Idaho Falls District. The schools include large traditional high schools such as Thunder Ridge High School and Idaho Falls Senior High School, plus alternative, online, and specialty academies like Emerson High School, Bonneville Online School, and Compass Academy. Both districts rank in the middle of Idaho's 101 districts, but outcomes for individual schools in this zip code range from statewide leaders to schools at the very bottom.
Compass Academy is the clear standout, ranked 8th of 122 Idaho high schools (93rd percentile, 5 stars) with 81.6% ELA proficiency on the 2025-26 ISAT. Praxium Mastery Academy also excels academically, posting 87.1% math and 95.9% ELA proficiency despite having the highest student-teacher ratio (27.2) in the area. Among traditional schools, Idaho Falls Senior High School performs best, ranked 53rd of 122 and the only one to beat the state average in math (37.4% vs. 33.1%). At the other end of the spectrum, Emerson High School ranks 121st of 122 with 63.7% chronic absenteeism, Lincoln High School has just 11.1% ELA proficiency, and Technical Careers High School spends the most per student ($13,104) yet achieves only 13.3% ELA proficiency.
Bonneville Joint District's two large high schools have declined sharply, with Thunder Ridge falling from 65th to 98th and Bonneville High School dropping from 50th to 106th in state rankings, while Idaho Falls Senior improved from 85th to 53rd. Zip-code-wide proficiency averages trail the state in math (23.8% vs. 33.1%), science (33.0% vs. 41.2%), and ELA (42.8% vs. 61.3%). Chronic absenteeism averages 20.6%, well above the state's 13.8%, though Praxium (5.3%) and Bonneville Online School (3.2%) are bright spots. High poverty does not automatically mean low performance: Compass Academy has a 39.95% free/reduced lunch rate yet is the top-ranked school in the zip code. Ultimately, this area is defined by fragmentation — different school models, different student populations, and vastly different outcomes within a few square miles.
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