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.