Krishnagar Collegiate School was established in 1846 alongside the government college and is among the oldest secondary schools in West Bengal. The main building is a long colonial structure with a low colonnade on the front, set in a generous compound just east of the Rajbari.
The school is still in active use, but the public area near the gate gives a sense of the scale of the original campus. It is a useful stop on a walking tour of nineteenth-century Krishnanagar, between the palace and the college.