Rajnagar Upazila: History
It is suggested that the area was inhabited by Buddhists and Hindus as evidence from inscriptions suggests there was an ancient university in Panchgaon, Rajnagar. The terrain was headquarters of the ancient Ita Kingdom founded by Raja Bhanu Narayan and its capital was in the villages of Bhumiura and Eolatoli.. Copper plates have been found from 930 AD in Paschimbagh, Tengubazar Mandir, Rajnagar. The district was also part of the ancient Kamarupa kingdom. In the mid-14th century, Shah Ruknuddin settled and propagated Islam in Kadamhata, Ita Pargana. Ruknuddin's mazar remains in Kadamhata Bazar.
Rajnagar contains many tea gardens and historical places. During the Bangladesh Liberation War, the Panchgaon Factory in Rajnagar Upazila produced cannons under the command of M. A. G. Osmani. A famous historical cannon, nicknamed Jahankosa, built by Janardan Karmakar remains in display in Dhaka. The first Upazila Chairman Freedom Fighter Rana Choudhury is the founder of Rajnagar Degree College (Principal Abdul Ahad Choudhury founded the college in 1982); Major General Abdu Rab is the co-founder of that college. The present Upazila Chairman is Freedom Fighter Md. Askir Khan of the Ruling Party Awamileague. For the last two terms Md. Misbahuduzza (Velai) of Awamileague has been the Upazila Chairman of Rajnagar. Munshibazar is one of the most important commercial unions in this Upazila due to the large number of goods and services. The tea gardens produce plenty of different types of tea and fruit as well. It has big Hawrs and hills that makes it unique one in the upazilla.