Summary:
ZIP code 97914 in Ontario, Oregon is home to four elementary schools enrolling a combined 1,121 students, and because they serve different grade bands—from K–1 at May Roberts Primary School to K–8 at Annex Charter School—test-score comparisons here are not fully apples-to-apples. Three of the schools belong to Ontario School District 8C, while Annex Charter is its own district, Annex School District 29.
Annex Charter School is the clear standout. Its district is rated 4 stars (41st of 141 districts, 71st percentile), and its school rank jumped to 310 of 709, 56th percentile, 3 stars in 2025–2026 from 535 of 706, 24th percentile, 1 star the prior year. It is the only school in this group above the state in all reported all-grade subjects: ELA 48.9% vs 43.8%, math 41.3% vs 32.9%, and science 36.4% vs 30.6%. It also posts the lowest chronic absenteeism at 10.9%, far under Oregon's 33.5%.
Among the Ontario district schools, Alameda Intermediate School has the strongest current results (ELA 39.9%, math 27.7%, science 19%)—above its district but below the state. Aiken Elementary School trails furthest in ELA at 13.8%. May Roberts Primary School has no OSAS scores because it serves K–1, and some Annex middle-grade results are state-suppressed. Notably, all four schools sit below the state chronic absenteeism rate.
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