Cedar Ridge High School is a public secondary school in Round Rock, USA. For the 2010-2011 school year, the school includes grades nine and ten. Grade eleven was added in 2011-2012 and grade twelve in 2012-2013. The school is the largest high school in the Round Rock Independent School District (RRISD), and in Central Texas with an enrollment of more than 3,000 students. Admission is primarily based on the locations of students' homes in the district.