Washington

Washington State Science Olympiad has grown more competitive over the years, with a number of new schools and teams each season. It has grown from having only three regional tournaments to having five regional tournaments. The three regions of Washington are the Northwest Region (Seattle Central College and Highline College), the Eastern Region (Spokane Falls Community College and Yakima Valley Community College), and the Southwest Region (Lower Columbia College). In recent years, the state tournament has been held at either Clark College or Eastern Washington University. However, the 2015 state tournament was held at Highline Community College on April 18, 2015, the first time in many years the state tournament had been held in the Northwest Region.

Past State Champions
This is a record of the past state champions and runners up, and their respective places at the national competition, if applicable. Scores at the state competition may be shown in parentheses.

Invitational Competitions

 * Southwest Region Invitational - Clark College (Division A)
 * Southwest Region Invitational - Camas High School (Division B)
 * Southwest Region Invitational - Camas High School (Division C)
 * Northwest Region Invitational - Canyon Park (Division B)
 * Northwest Region Invitational - Interlake High School (Division C)
 * Northwest Region Invitational - Aviation High School (Division C)

Regional Competitions

 * Eastern Region (Division B/C) - Spokane Falls Community College
 * Northwest Region (Division B/C) - Seattle Central Community College
 * Southwest Region (Division B/C) - Lower Columbia College
 * South Central Region (Division B) - Yakima Valley Community College

State Competition

 * Highline Community College (2015)
 * Eastern Washington University (2014)
 * Clark College (2013)
 * Eastern Washington University (2012)

Eastern Region

 * Chelan Middle School
 * Cheney Middle School
 * Colton School
 * Frontier Middle School
 * Greenacres Middle School
 * Jenkins Middle School
 * Reardan-Edwall Middle School
 * St. Joseph's School

Northwest Region

 * Canyon Park Junior High School
 * Northshore Jr High School
 * Stanwood Middle School
 * Port Susan Middle School
 * Seattle Academy of Arts & Science
 * Mount Baker Middle School
 * Timbercrest Jr High School
 * Lakeside School
 * Kenmore Junior High School
 * The Bear Creek School
 * Chimacum Middle School
 * Pacific Cascade Middle School
 * La Conner Middle School
 * Beaver Lake Middle School

Southwest Region

 * ExCEL Homeschoolers
 * Skyridge Middle School
 * Jason Lee Middle School
 * Liberty Middle School
 * Maple Grove Middle School
 * Tukes Valley Middle School
 * Hockinson Middle School
 * Evergreen Christian School
 * Toledo Middle School
 * Washington Middle School
 * Huntington Middle School

Northwest Region

 * Bothell High School
 * Interlake High School
 * Stanwood High School
 * Aviation High School
 * Lakeside School
 * Curtis Sr High School
 * The Bush School
 * Skyline High School
 * Sehome High School
 * Bellevue High School
 * Redmond High School
 * Inglemoor High School
 * Coupeville High School
 * Chimacum High School
 * Thomas Jefferson High School
 * Bellingham High School
 * Woodinville High School
 * Shorewood High School
 * Orting High School
 * Eastlake High School

Southwest Region

 * Camas High School
 * Columbia River High School
 * Prairie High School
 * Mountain View High School
 * ExCEL Homeschoolers
 * Union High School
 * Washougal High School
 * Evergreen High School
 * RA Long High School
 * Mark Morris High School
 * Heritage High School
 * Centralia High School

Eastern Region

 * Central Valley High School
 * Kamiakin High School
 * Colville High School
 * Moses Lake High School
 * Jenkins High School
 * Shadle Park High School
 * Clarkston High School
 * Chelan High School
 * Kennewick High School
 * Delta High School
 * Southridge High School
 * Reardan-Edwall High School
 * Mary Walker High School
 * Medical Lake High School
 * Colton High School