Phase 2 was completed in March 2020 and included the instrumental and vocal rehearsal rooms, art department, wood shop and metal shop, commons, and performing arts center.

Though connected to Centralia public utilities, CHS is located in the unincorporated community of Ford's Prairie.

Centralia High School is a member of the WIAA (Washington Interscholastic Activities Association) in the 2A Evergreen Conference.

During the Fall season the school sanctions the following sports: Cheerleading, Football, Girls' Soccer, Cross Country, Boys' Tennis, Boys' Golf, Girls' Swimming, Volleyball.

The first football matchup between the schools took place on Thanksgiving Day, 1907, and the rivalry was continued on the holiday every year until 1963, when it began to move to other weeks.