Shelton High School is a senior high school located in Shelton, Washington. Shelton High School is a class 3-A high school and was restructured starting with the 2004-2005 school year to be a Grade 10-12 High School. More than 1000 students, grades 10-12, are enrolled at SHS. The high school is at capacity and needs to have additional space added before it can become a 9-12 high school again.