Castleson High is a high school institution established in 1995. Informally referred to by its acronym "CH", it is a private, non-sectarian, educational institution located in City Heights, 5 kilometers south of Bacolod City, the capital of Negros Occidental province and Victorias City, 34 kilometers north of Bacolod City in the Philippines. High school enrollment at both of these locations is close to 100 students. Its major feeder elementary schools come from Jack and Jill School branches and other local schools. At the City Heights location, the Sidera Special Child Center mainstreams its high school students at Castleson High.