Summary:
ZIP code 99320 has one middle school, Kiona-Benton City Middle School, serving students in grades 6–8 in the Benton City area. The school enrolls about 340 students and is part of the Kiona-Benton City School District. Because it is the only middle school in the ZIP code, families cannot compare it with another local middle school; the most useful comparisons are with district and Washington state results.
The school’s 2025–2026 test results show significant academic challenges across all subjects. Overall proficiency was 14.71% in English language arts, 7.24% in math, and 18.92% in science. Math is the clearest area of concern, with proficiency below 10% in every grade: 8.89% in sixth grade, 6.80% in seventh grade, and 6.31% in eighth grade. ELA performance was also consistently low, ranging from 12.50% in seventh grade to 16.22% in eighth grade. Science was the school’s strongest subject, although its rate remained well below Washington’s 50.95% statewide average. Overall, the school trailed state averages by more than 30 percentage points in every tested subject and was approximately five points below district results in each subject.
Recent results show mixed progress. From 2024–2025 to 2025–2026, science proficiency increased by 3.46 percentage points, while ELA declined by 5.23 points and math declined by 2.42 points. The school’s rankings have remained near the bottom of its comparison group for three consecutive years, and the district is reported in the second percentile statewide. The relatively similar results across grades suggest that the challenges are schoolwide rather than limited to one grade. Families may also wish to consider the school’s 16.9-to-1 student-teacher ratio, $16,433 per-student spending, and 13.53% free- or reduced-price-lunch rate when seeking additional information about support programs, instruction, and improvement plans.
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