Mathbaria (Bengali: মঠবাড়িয়া) is an upazila consisting of eleven unions under Pirojpur district under Barisal division.The number of voters is about 2 lakh 9 thousand 706 and the number of new voters is 19 thousand 943[4] Mathbaria is located at 22°17′13″N 89°58′00″E / 22.2869°N 89.9667°E / 22.2869; 89.9667.

Notable figures in Mathbaria's history include Mahyuddin Ahmed, Shaheed Noor Hossain, and Major (Retd) Mehedi Ali Imam.

Significant water bodies in the area include the Baleshwari, Kocha, and Pona rivers.

The electricity and drinking water supply systems in the upazila are improving, but the sanitation and health center conditions need enhancement.

Mathbaria has a literacy rate (age 7 and over) of 61.7%, compared to the national average of 51.8%, and a sex ratio of 1040 females per 1000 males.