St. Joseph's Convent Sr. Sec. School, Sagar was founded on 6 January 1906 by the Indian Province of the Sisters of St. Joseph of Chambery. The school is run by the sisters of St. Joseph. The institution imparts education up to 10 + 2 level. The school campus is divided into Pre – Primary, Primary, Middle, Secondary & Senior Secondary level.

The school is affiliated to CBSE. It has 14 acres of land with a built-up campus area in 2 acres with over 4000+ students studying currently. The school has been ranked no. 1 in Sagar city with high quality education.