Summary
Sunny Hills High is a 2,337-student public high school serving grades 9–12 in Fullerton, within the Fullerton Joint Union High School District. Its most important distinction is that it ranked second among nearby schools with current-year results in all three tested subjects, behind Troy High each time.
Sunny Hills is strong compared with both the state and district, and science—while still a strength—is its least pronounced advantage. In 2025–2026, about 78% of students were proficient in English language arts (ELA), 61% in math, and 55% in science; the state results were about 49%, 38%, and 36%, respectively. Sunny Hills’ advantage over the state was 28 points in ELA, 23 in math, and 19 in science; its advantage over the district was 12, 15, and 10 points. Troy scored about 86%, 76%, and 75%, while the next-highest nearby results after Sunny Hills were Sonora High’s 76% in ELA, 49% in math, and 49% in science.
Scores remain well above state results, but they have eased since 2022–2023: ELA fell 2 points, math 4, and science 2, while the school’s state gaps narrowed by about 5, 8, and 8 points. SchoolDigger ranked Sunny Hills at the 91st statewide percentile in 2025–2026 (rank 191 of 2,137; 5 stars). Its 2024–2025 student-teacher ratio was 25.2, the third highest among nine nearby schools with reported ratios. Also for 2024–2025, 49% of students were free/reduced lunch eligible; this was the second-lowest rate among nearby schools with the same measure and year. SchoolDigger’s ranking for how well the school serves Special Education Students was at the 56th percentile in 2025–2026, compared with 91st overall and down from the 80th percentile the previous year. Its ranking for how well it serves Multi-racial Students was at the 54th percentile, following the 78th percentile in 2023–2024 and 68th in 2024–2025.
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