The vision of the school is the fashioning and turning out physically and mentally healthy Sirimavians with a great sense of duty, well disciplined, well mannered with love for the environment and who will portray our national culture and identity.

The school inaugurated on 1^st of January 1973 as Stanmore Crescent Primary School and re-named in December 1973 as Sirimavo Bandaranaike Primary Girls School in honor of then Prime Minister Madam Sirimavo R.D. Bandaranaike. From a Primary School, the school developed in to a secondary school and finally to a leading national school within seventeen years of period.

The school has taken giant strides within a short period to enter through the portals of prestige to reach great heights and carve her name in the plaque of achievements as a leading girls school in the island. At present the school shelters over 3000 Sirimavians enjoying educational facilities guided by a staff of about 150 teachers devoted to the task of providing knowledge and skills and assisting the pupils in the development of aptitudes and attitudes that are a prerequisite to character building and good citizenship.