Medical Lake High School is a four-year public secondary school in Medical Lake, Washington, the sole traditional high school in the Medical Lake School District (#326) in western Spokane County. West of the city of Spokane, the school district includes the base housing area of Fairchild Air Force Base to the north.^[4]

Medical Lake High School was founded in 1905, in Medical Lake, Washington. In 1958, the high school was refounded and moved into a new building, but then was added on to in 1970 to encompass the growing number of students being enrolled.

In 2017, a Medical Lake High school student was investigated for a Google Drive filled with sexually explicit pictures of other students with the youngest victim being 14.^[5] In February 2018, a threat was made against the school by a student and was investigated by the Spokane County Sheriff's Office.^[6] A few months later in April 2018, a Medical Lake student was killed while three other students were injured in a car crash when headed to a track meet.^[7] This started the #MedicalLakeStrong movement in Spokane, with schools such as Freeman High School and Shadle Park High School offering their support and solidarity.

That June, the district announced that they had received a one million dollar STEM grant and that the high school students would be receiving their own personal Chromebooks that September.^[8] In November 2021, a bombing threat against Medical Lake High School was exposed.^[9]

Enrollment has declined within the Medical Lake School District^[3] and is expected to continue. A contributing factor has been the privatization of base housing at Fairchild Air Force Base; an increasing number of military families have chosen to live off-base and outside the M.L. school district. A building moratorium by the city of Medical Lake and a sluggish economy have also contributed.^[10]

MLHS grew in the 1970s from 487 in 1970^[11] to 650 in 1978,^[12] but declined in the early 1980s to below 500 in 1983 and athletics dropped from the 'AA' Frontier League and returned to the 'A' NEA in 1984.^[13] Enrollment was 675 in October 2007, but fell to 512 in four grades in May 2012.^[3] As of 2021, the current enrollment number is 517.^[14]

• Principal: Chris Spring
• Vice Principal: Justin Blayne
• Vice Principal: Lyra McGirk
• Athletic Director: Dawn Eliassen

• Cedric Jackson, professional basketball player
• Paul Butorac, professional basketball player