Sekolah Menengah Kebangsaan All Saints is a single-session secondary school located in Jalan Teluk Likas of Kota Kinabalu, Sabah, Malaysia. It is also known as All Saints Secondary School and SM All Saints for short. The school was opened in 1903 when Kota Kinabalu was known as Jesselton, making it one of the oldest schools in Kota Kinabalu. The current principal of the school is Dr. Mary Gambidau. The school is recognised as one of the leading secondary schools in the state. All Saints has been ranked amongst the highest-achieving schools in Sabah.