Barangay Olympia belongs to Makati City's first district, and is a member of the Northwest Cluster or Cluster 3 of Makati. The barangay is a residential area with a population of 21,270 recorded by the 2010 census, which is 4% of the total population of Makati City. On the other hand, the barangay’s land area is only 0.4565 square kilometers or 1.70% of the total land area of Makati. There are 47 residents per 1,000 square meters.
The Barangay came from 3 former Sitios: Proper, Obrero and Sampalukan and was later called HINYERO after a German Engineer who lived in the area, but it was changed to OLYMPIA after the tile and brick factory on the bank of Pasig River adjacent to the Lazzai Building.
The barangay also hosts the part of Makati Circuit, formerly known as the Philippine Racing Club (PRC) together with Brgy. Carmona.