Sirajganj is a city in north-western Bangladesh on the right bank of the Jamuna River, located in Rajshahi Division. It is the administrative he…Sirajganj is a city in north-western Bangladesh on the right bank of the Jamuna River, located in Rajshahi Division. It is the administrative headquarters of Sirajganj District, and with a population of 188,528 is the 14th largest city in Bangladesh.