Lunsar is a town in Marampa Chiefdom, Port Loko District in the Northern Province of Sierra Leone. It is the largest town in Port Loko District by population. The Britannica estimate of the population of Lunsar is 36,108. The town is one of the main commercial and business hub in the North of Sierra Leone. Lunsar lies approximately 50 miles east of Freetown and about 18 miles south-east of the district capital of Port Loko. The inhabitants of Lunsar are largely from the Temne ethnic group.