Peachtree Ridge High School is a public high school in Gwinnett County, in Suwanee, Georgia, United States. It is a part of Gwinnett County Public Schools. It is one of two public schools in the county to use block scheduling, the other being Shiloh High School. The school officially opened for classes on Monday, August 11, 2003, with enrollment topping 1,900 students. By November of the same year, another 19,570 square feet (1,818 m2) of athletic facilities (field house) were nearing completion.