Graduation rates in Thurston County public schools vary considerably based on the year and whether the school is a traditional or non-traditional/alternative school. Traditional schools tend to have graduation rates that are significantly higher than state and countywide averages, while non-traditional schools tend to have lower graduation rates.
In Thurston County, the school with the highest graduation rates for the 2020-2021 school year was Tumwater High School (96%). River Ridge High School's graduation rates have increased the most, rising from 72% in 2013 to 87% in 2021.
Both the statewide and countywide graduation rates increased between 2013 and 2021. However, the statewide graduation rate has been consistently higher than the countywide graduation rate over the last eight years.
OSPI calculates graduation rates using the “adjusted cohort rate” methodology. Students are placed in a group — or cohort — based on the year they enter ninth grade for the first time. The calculation adjusts for students who transfer into a Washington public high school for the first time and join a cohort. Students are removed from the cohort if they transfer out of public school in Washington. OSPI tracks 4- 5-, 6-, and 7-year cohorts, but only the 4-year cohort is reported in the Profile.
The adjusted cohort method tracks individual students over time and does not rely on estimates. It generally aligns with what most people think of as a graduation rate: Among a group of students who started high school together, what percent graduated in four years?
Washington State Office of Superintendent of Public Instruction