Sekolah Menengah Kebangsaan Subang Jaya (SMKSJ, formerly Sekolah Menengah Subang Jaya) is a secondary school in Subang Jaya, Selangor, Malaysia. It was the first school to be established in the Subang Jaya region in 1981. Due to the lack of classrooms, SMK Subang Utama was built to accommodate the students residing in Subang Jaya.