Snohomish High School (SHS) is a secondary school located in the Snohomish School District, in Snohomish, Washington, United States. SHS, built for 1200 students, contains 1,565 9th–12th graders (as of 2022–23). The school serves primarily those students living north of the Snohomish River (nearby Glacier Peak High School, serving those students living south of the river).

Before SHS actually opened it was a courthouse with a small jail section underneath. SHS first opened in 1894 at the completion of the original A building. The school underwent many remodels through the 1980s, including changes to the B building. These changes removed the last vestiges of 'old' Snohomish High School, making the building completely modern. Among the changes made to the B building were the removal of its decades-old fixed wooden bleachers and over-painting of many student-painted murals from the 1960s and earlier. There were also additions of music, science, and vocational buildings during this time. In an attempt to curb overcrowding, the C building was constructed and opened in 1999, adding ten more classrooms. As the school became more crowded, it received a grant to remodel the campus, tearing down the B building was a major change. Parts of B building have been incorporated into the schools newer buildings.

SHS is a member of the WESCO 3A division of Washington state, and has won several state championships in both boys’ and girls’ sports. Snohomish's biggest high school rivalry is against Glacier Peak High School.

• Baseball (1998, 2008)
• Basketball, boys' (1970)
• Cross country, boys' (1960, 1965)
• Cross country, girls' (1995, 1996, 2002, 2003)
• Fastpitch softball (2016)
• Football (1976, 1978)
• Golf, boys' (2001, 2009)
• Soccer, boys' (2000, 2006, 2014, 2015)
• Soccer, girls' (1984, 1997)
• Swimming, boys' (2006, 2007, 2008)
• Track & Field, girls' (1988, 2001, 2002)

• Earl Averill Jr. - MLB player with the Cleveland Indians, Chicago Cubs, Chicago White Sox, Philadelphia Phillies, and an original member of the Los Angeles Angels; All American at University of Oregon
• Jon Brockman, NBA player, University of Washington's all-time leading rebounder and second-all-time leading scorer
• Rick Fenney - former NFL running back, Minnesota Vikings
• Steve Hardin - CFL player offensive guard
• Earl Torgeson - MLB first baseman with the Boston Braves, Philadelphia Phillies, Detroit Tigers, Chicago White Sox, and New York Yankees
• Chelsey Glasson - American user researcher and activist

• Official website
• Official Snohomish School District website