Sayyidina Ali Secondary School (Malay: Sekolah Menengah Sayyidina Ali, Abbrev: SMSA), is a co-educational school located in Kampong Pandan, a suburban village in Kuala Belait, Brunei.

The current principal is Ms Mas Diana Binti Haji Abdul Samat.

In 1997, a sixth form centre was introduced, enabling students in Kuala Belait to pursue their pre-university studies locally.

At present, the school offers curriculum leading up to BC-GCE "O" and IGCSE examination, including BTEC qualification.

•Year 7 •Year 8 •Year 9 •Year 10 •Year 11 The school offers 15 subjects for the GCE "0" Level and IGCSE course,namely: