The college is affiliated to Mahatma Gandhi University Kottayam and was re-accredited with A++ grade by NAAC in February 2021.

The main block, "Tisserant Hall", called A-block, stoutly built with an enormous roof span and massive columns was ready to house the administration, classrooms, laboratories and libraries in 1953.

The college celebrated its Silver Jubilee in 1976 with Prime Minister Mrs. Indira Gandhi as the chief guest.

The preceding decade had been one of hectic academic activity during which more Post graduate courses- English, Physics, Economics and Mathematics were started, new hostels inaugurated, more blocks added to the cluster of buildings in the campus etc.

Vellankal included an illustrious line of academic administrators combining erudition with sharp acumen - Fr.

The National Assessment and Accreditation Council (NAAC) has awarded A++ Grade to St.Thomas' College with CGPA score 3.56.