Creekside High School (CHS) is a public high school in the St. Johns County School District, located in northwest St. Johns County, Florida (United States). The school was constructed to relieve overcrowding at Bartram Trail High School.

The attendance boundary includes a portion of Fruit Cove.

The building has a capacity of 1,500 students and cost over $65 million. The school now services a total of 2550 students making the problem of overcrowding pandemic. The school building is a two-story octagon with an open courtyard in the center. The gymnasium and auditorium are attached on opposite sides, and the parking lots are between the school and most of the athletic facilities. The school opened for the 2008–2009 school year, and graduated their first senior class in June, 2010. The main feeder schools are Fruit Cove Middle School and Patriot Oaks Academy.

The curriculum at Creekside High School offers academy programs in the areas of environmental/urban planning and emerging technology. Creekside now offers The Academy of Future Teachers as of the 2019–2020 school year.

The advanced scholars program at Creekside High School gives students the option to participate in the rigorous programs of advanced placement, dual enrollment and honors courses.

The school mascot is the knight in armor and the colors are red, black and white.

The Creekside Knights Athletic Booster Club (CKABC) is a nonprofit organization of parents, coaches, student athletes, faculty, alumni & community members. The CKABC supports all CHS athletes, including fall, winter and spring sports programs. Contributions by families & supporters help maintain and improve playing fields and gymnasium, purchase equipment and uniforms, and fund the CKABC Scholarship Award.

Creekside has been district runner-up twice in 2011 and 2012.^{[citation needed]}