The School had a humble beginning in pre independence time, in the year 1931, with 50 students in SS. Peter and Paul Cathedral premises. In 1936 the school attained the status of secondary school and on January 31, 1947 it received permanent recognition from the government. Due to the lack of space in St. Thomas School building, the secondary section was conducted on the second floor of present St. Aloysius Sr. Sec. School. It was in the year 1956 the present campus St. Thomas Hr. Sec. School was ready and was blessed by Rev. Fr. Conrad Ignatius Dubbleman O’Praem. The classes from 6^th to 11^th (then) was shifted to the new campus while Primary section remained in the old campus till 1997. Now the present school campus is fully equipped and furnished with blended latest education system to impart the knowledge from KG to Higher Secondary level. For a long glorious period of Seven Decades the school served the people of Jabalpur as Hindi Medium school and only in 2003 shifted its medium of instruction in English.