Sandy High School (SHS, formerly known as Sandy Union High) is a public high school in the northwest United States, located in Sandy, Oregon, east of Portland. Originally located in a two-story schoolhouse in 1917, the high school was given its own standalone brick structure in 1923 to accommodate a growing student body as the Portland metropolitan area and surrounding cities expanded in population; that building is used now as Cedar Ridge Middle School.

The high school continued to expand throughout the 20th century, with numerous additions and exterior buildings being added to its campus (then located at 17100 Bluff Road). In 2008, voters approved an education bond enabling the construction of a new school building. The new building, constructed on a budget of $75 million, opened in September 2012, and features various updated and new technologies absent from the previous school, including a 500-seat auditorium, outdoor learning and vocational spaces, geothermal heating, and greywater recycling.

Since 1997, Sandy High School has been operated by the Oregon Trail School District, and is the district's only high school.