Best High Schools in Zip Code 98390

ZIP code 98390 has one listed high school, Sumner High School, serving grades 9–12 in the Sumner area. The school enrolls about 1,857 students and is part of the highly rated Sumner-Bonney Lake School District, which ranks 13th out of 238 Washington districts and is in the 95th percentile. Because there is only one high school in the ZIP code, families are evaluating this school on its own performance rather than comparing several local high schools.

Sumner High School shows especially strong results in English language arts and graduation. In 2025–2026, 77.75% of students were proficient in ELA, about 25 percentage points above the state rate and more than 5 points above the district rate. The school’s 92.8% graduation rate in 2024–2025 was also well above Washington’s 82.6%, although it was slightly below the district’s 93.5%. Its 4.1% dropout rate was much lower than the state rate of 9.8%, but higher than the district’s 3.1% rate. These results indicate strong overall student completion and literacy outcomes, while also suggesting that some students may need additional support staying engaged through graduation.

Math and science are the most important improvement areas at Sumner High School. Math proficiency improved from 40.09% to 44.71% year over year, but remained 15.52 points below the district and only slightly above the state. Science proficiency was 47.61%, below both the district and state. The school’s ranking improved to 87th of 396 schools in 2025–2026, up from 122nd the prior year, and it retained a four-star rating. Overall, the school offers a strong academic and graduation profile, with the clearest opportunities in STEM achievement and reducing the dropout rate to match the district.