Post Proper Southside, also known as Post Proper South Fort Bonifacio, Barangay 31, or simply Southside, is one of the 38 barangays of Taguig, Philippines. It is one of the ten Embo barangays, and one of the two Inner Fort Bonifacio barangays, the other one being the Post Proper Northside. It was established in 1972 as a barangay under Makati, and its de facto territory consists of multiple exclaves mostly within Palar Village of Barangay Pinagsama and settlements along the Consular Road area between McKinley West of the Bonifacio Capital District and Bonifacio Global City (BGC) in Barangay Fort Bonifacio, Taguig. It also has the Fort Andres Bonifacio military camp.