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