Again in 2003 a new main entrance and office was built, a second gym, new science wing and a new auditorium for the arts; the 2003 additions opened to students in fall 2005 for the Class of 2006.

The McLaurin Junior High School on Calhoun Street now houses Grace Baptist Church.

The Sumter High campus is home to the largest environmental center in the state, and has four classroom sites, walking paths and three boardwalks.

Success include many state championships in multiple sports such as soccer, track, tennis, golf, football and baseball.

Men's sports at Sumter include baseball, basketball, cross country, football, golf, soccer, swimming, tennis, track, and wrestling.

Women's sports at Sumter High include basketball, bowling, cheerleading, cross country, golf, soccer, softball, swimming, volleyball, track, tennis, and wrestling.

In the 2008–09 year, SHS'S football team made it to the 4A Division I State Championships against James F. Byrnes High School, where it was held at Clemson University.

Adjacent to the school on the campus are the newly renovated baseball and softball stadiums, along with tennis and soccer.

Golf is played at Sunset Country Club and swimming at the City of Sumter Aquatics Center.