The school was established in the year 1965.The school name was derived from Maasai community since it was their area of settlement.
The headteacher wa sMr samuel Kinyanjui who was a PTA teacher hired by the catholic church with three other teachers.
The first TSC teacher was posted in 1972.
The first enrolment was about 250 pupils.
In 1989 the school was split into two due to population increase and the new one was named as Muriundu Primary School.