About Karimganj Karimganj is a city located in the Indian state of Assam. It is the headquarters of the Karimganj district. Karimganj is situated on the banks of the Kushiyara River. The city is known for its tea production.ย The early history of the present-day Karimganj district in Assam is vague and confused. It is difficult to develop a temporally full narrative of the region's early history using the available source materials and data. Only a general outline can be attempted, with significant gaps.