Sapahar upazila on the north, Gomastapur and Niamatpur upazilas on the south, PatniTala and Mahadevpur upazilas on the east, West Bengal on the west.

Porsha thana was established in 1933 and was turned into an upazila in 1983. It consists of six union parishads, 244 villages and 155 mouzas.

Porsha Upazila is located in Naogaon District. Upazilla(s)/Thana(s) in Naogaon are Atrai Upazila, Badalgachhi Upazila, Dhamoirhat Upazila, Mahadevpur Upazila, Manda Upazila, Naogaon Sadar Upazila, Niamatpur Upazila, Patnitala Upazila, Porsha Upazila, Raninagar Upazila, Sapahar Upazila.