Summary
Arlington High is a public high school serving grades 9–12 in Riverside, with 1,920 students in Riverside Unified. Its completion results are a bright spot: the graduation rate is 96%, compared with 88% statewide, and its dropout rate is 2%, versus 8% statewide. But strong completion does not mean strong achievement in every subject: math proficiency is 18%, 21 points below the state, Arlington’s clearest academic concern.
ELA is Arlington’s strongest tested subject in the all-grades comparison: 54% are proficient, 5 points above the state and 7 above the district. It is also about 1 point above the nearby comprehensive-school average, ranking third among Ramona High, Norte Vista High, Hillcrest High and La Sierra High. However, Arlington’s 11th-grade ELA result is 3 points below the state and 5 below the district. Math is also about 1 point below those nearby schools’ average, while science proficiency is 25%—11 points below the state, 7 below the district and 5 below the nearby average.
Over time, science has improved by 7 points since 2022–2023, while ELA has fallen by 1 point and math has risen by 2; because statewide math improved faster, Arlington’s math gap widened by 2 points. SchoolDigger places Arlington at the 46th statewide percentile with 2 stars in 2025–2026, down 12 percentile points from 2021–2022, though up 1 point from the prior year. Its student-teacher ratio is 22.5:1, close to the nearby-school average of 22.1:1. In 2024–2025, 81% of students were free/reduced lunch eligible. SchoolDigger’s measure of how well the school serves Special Education Students places Arlington at the 12th percentile, compared with the school’s overall 46th percentile. Its Asian Students’ percentile also fell sharply, from 46 in 2023–2024 to 12 in 2025–2026.
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