Summary:
Zip code 92882 has two public high schools in Corona, both serving grades 9–12 in Corona-Norco Unified: Corona High enrolls 2,307 students, while Orange Grove High enrolls 162. The schools’ results differ sharply in both test proficiency and attendance: Corona’s chronic absenteeism was 18%, compared with 75% at Orange Grove, and their graduation rates were 99% and 82%. The central finding for families is that these two schools present very different academic and school-outcome profiles, so an area-wide average would hide important differences.
Corona High stands out as the stronger performer in every reported subject, while Orange Grove High is far behind. In 2025–26 all-grades results, Corona had 51% proficiency in ELA, 23% in math, and 33% in science; Orange Grove had 2% in ELA and 0% in math and science. The gaps between schools were 49 percentage points in ELA, 23 in math, and 33 in science. Corona’s ELA result was 1 point above the state’s 49%, but its math and science results were 15 and 3 points below state levels. Orange Grove was below the state by 48 points in ELA, 38 in math, and 36 in science. Corona’s 11th-grade results were also below the state in all subjects, by 7 points in ELA, 9 in math, and 6 in science.
Recent changes were mixed, but Corona’s ELA decline was especially notable: from 2024–25 to 2025–26, its ELA proficiency fell 13 points, math fell 1 point, and science rose 1 point; Orange Grove’s ELA fell 6 points, math stayed at 0%, and science fell 1 point. SchoolDigger’s statewide percentile ranking in 2025–26 was 52 for Corona, down from 64 in 2024–25, and 1 for Orange Grove, compared with 2 the prior year. As context, in 2024–25, 86% of Corona students and 93% of Orange Grove students were free/reduced lunch eligible; Corona’s student-teacher ratio was 23.6, versus 11 at Orange Grove, and reported spending was $24,976 versus $64,389 per student. These figures describe contrasts, not explanations for the schools’ results.
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