Kalia is an upazila of Narail District in the Division of Khulna, Bangladesh. Kalia Thana was established in 1866 and was converted into an upazila in 1984. It is named after its administrative center, the town of Kalia.GeographyKalia Upazila has a total area of. It borders Lohagara Upazila to the north, Dhaka Division to the east, Bagerhat and Khulna districts to the south, Jessore District to the southwest, and Narail Sadar Upazila to the northwest. The Nabaganga River flows south through the upazila.