Summary:
ZIP code 91766 has three high schools in Pomona Unified: Garey High and Diamond Ranch High serve grades 9–12, while Fremont Academy of Engineering and Design serves grades 7–12. Graduation rates are strong: 93% to 96% at the three schools, compared with 88% statewide. Chronic absenteeism is a concern at each, ranging from 22% to 31% versus 18% statewide. The clearest shared-grade finding is that all three schools are above the state in 11th-grade English, but only Garey is above the state in 11th-grade math.
By the All Grades results, Diamond Ranch stands out in English, with 68% proficient, compared with 61% at Garey and 37% at Fremont; its result is 19 percentage points above the average of the other two. Garey leads in math at 36% and science at 40%—about 5 points above Diamond Ranch in math and 19 points above it in science. Fremont has the lowest All Grades English and math results, at 37% and 21%; those are 13 and 17 points below the state, respectively. In 11th-grade English, however, Fremont reaches 59%, above the state’s 57%. Its broader grade span matters when comparing All Grades results with the two 9–12 schools.
Recent results improved most consistently at Garey: from 2024–2025 to 2025–2026, it gained 8 percentage points in English, 10 in math and 17 in science. Fremont gained 7 points in math and 9 in science, while Diamond Ranch’s English was essentially unchanged, math rose 4 points and science fell 1 point. SchoolDigger’s statewide percentile ranking rose from 43 to 70 for Garey and from 48 to 58 for Fremont; Diamond Ranch moved from 70 to 64. For additional context, 2024–2025 student-teacher ratios were 20.9 at Garey, 22.5 at Diamond Ranch and 18.6 at Fremont; the free/reduced lunch eligible measure that year was 92%, 79% and 93%, respectively. These measures describe differences between schools but do not explain them.
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