Summary:
ZIP code 99139 has two small schools operated by the Selkirk School District: Selkirk Middle School serves grades 6–8, and Selkirk High School serves grades 9–12. Together, they enroll 128 students in a small, rural-school setting, with no elementary or alternative school listed in the ZIP code. Class sizes are relatively small, with student–teacher ratios of 11.8:1 at the middle school and 10.4:1 at the high school.
Selkirk High School is the stronger performer in the available data. In 2024–2025, 75% of students were proficient in English language arts and 70.83% in science, both about 22 percentage points above state averages. In 2025–2026, 57.14% were proficient in math, compared with 43.11% statewide, including a particularly strong 10th-grade result. The school ranked in the top 16% of Washington high schools in 2024–2025. Graduation data is older but showed an 87.5% rate in 2021–2022. Current-year ELA and science results are suppressed, so the school’s recent performance in those subjects cannot be confirmed.
Selkirk Middle School shows a mixed pattern. Its 2025–2026 ELA proficiency was 57.78%, slightly above the state, and science proficiency was 53.85%, also above the state. Mathematics is the main concern: only 26.67% of students were proficient, compared with 43.11% statewide, and every tested grade fell below the state average. This represented a sharp decline from 56.86% math proficiency in 2024–2025, although the very small student population means yearly results can change substantially. Families should view suppressed figures as unavailable rather than zero and consider the middle school’s strong ELA and science results alongside its need for focused math improvement.
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