St Mary's Mbeya Secondary School

St Mary's Mbeya Secondary School (SMMSS) is a school in Mbeya, Tanzania, located on the Tanzania-Zambia Highway.

It serves students from the Tanzania Southern Highlands, Dar Es Salaam, Morogoro, Arusha, and Iringa regions. Students also attend from Malawi and Zambia.

The school is a branch/campus of the St Mary's International Schools in Tanzania, founded by Hon. Rev. Dr. Gertrude Rwakatare, a senior bishop and co-founder (in 1995) of the Mikocheni Assemblies of God church at Mikocheni, Dar es Salaam.

Though founded in 2005 as a girls' boarding school, the school is now coeducational. Instruction is in English.

The school enrolls students in form one for a four-year course leading to the award of the Certificate of Secondary Education Examination (TZ). It has a wide variety of subjects with graduate teachers and also has well-stocked science and computer laboratories, staffed by qualified personnel. Intakes are from November of every year at the premises.