Mariner High School is a public high school located in unincorporated Snohomish County, Washington, United States, just south of Everett. It opened on September 8, 1970, as the only high school serving the Mukilteo School District; it held this title until Kamiak High School opened in 1993. It currently serves grades 9 through 12.

Mukilteo School District No. 6 is a public school district that mainly serves Mukilteo, Washington. The Mukilteo School District includes all of the city, but also a portion of south Everett, Lynnwood, and Edmonds. The district had more than 14,600 students in 2013–14 and a budget of approximately $147 million.