吉大港縣
N1 exceeds seven upazilas on Chittagong district including Chittagong city. Upazilas are Mirsharai Upazila, Sitakunda Upazila, Boalkhali Upazila, Patiya Upazila, Chandanaish Upazila, Satkania Upazila and Lohagara Upazila. Length of N1 in Chittagong District is 148.06 km.