Montfort Agricultural Secondary School is a secondary school in Rujewa, Tanzania. It was founded in 1988 by the Indian branch of the Montfort Brothers of St. Gabriel, on 538 acres (2.15 km²) of land provided by the government.
As of 2005, the school teaches up to O-Level standard. There are 318 students, of whom 30% are girls, and 30% Muslims. There are boarding facilities for boys, accommodating 87 students, but none for girls. There are 24 teachers.
The main income for the school is provided by the school farm. The farm includes orchards, paddy fields, livestock (cows, oxen, pigs and chickens) and fish ponds. Irrigation is provided from the neighbouring village of Ubaruku by Mbarali Rice Farms, a branch of the National Food Corporation (NAFCO).