| Official Name: | Ususan |
| Settlement Type: | Barangay |
| Pushpin Map: | Metro Manila |
| Subdivision Type: | Country |
| Subdivision Name: | Philippines |
| Subdivision Type1: | Region |
| Subdivision Name1: | National Capital Region |
| Subdivision Type2: | City |
| Subdivision Name2: | Taguig |
| Subdivision Type3: | District |
| Subdivision Name3: | Part of the 1st district of Taguig |
| Government Type: | Barangay |
| Leader Title: | Punong Barangay |
| Leader Name: | Marilyn Marcelino |
| Leader Title2: | Sangguniang Kabataan Chairperson |
| Leader Name2: | Mary Avigail Felipe |
| Established Title: | Established |
| Population As Of: | 2020 |
| Population Total: | 53,956[1] |
| Timezone: | PST |
| Utc Offset: | +8 |
| Coordinates: | 14.5343°N 121.0676°W |
| Postal Code Type: | Postal Code |
| Postal Code: | 1639 |
| Area Code: | 02 |
Ususan is one of the 38 barangays of Taguig, Metro Manila, Philippines.
Ususan is Tagalog as the barangay is shaped like the letter “U” formed by the Taguig River. Historically, wood from the forest of Ususan and areas now part of Fort Bonifacio were transported along the riverbanks, earning it the moniker "Us-usan ng Kahoy" or "slide."
The old name of Ususan was Maysapang.[2]
Ususan is one of the original villages or barrios of Taguig when it was established as a pueblo (town) under the Provincia de Tondo in 1587.[3] During the Spanish government reign in Taguig, men from this barrio were forced to be part of the Polo y Servico.
Also under the jurisdiction of Barangay Ususan were the National Battle Monuments Cemetery,[4] also known as the Manila American Cemetery. Half of the Garden of Memories Memorial Park is also within the territory of the barangay.
Ususan is made up of four areas, namely: Subaan, Ibaba or Lungos, Kabilang Banda (Ibayo) and Pampangin.
As a barangay of Taguig, Ususan also claimed the northern part of Fort Andres Bonifacio, which particularly consists of the Bonifacio Global City and Manila American Cemetery,[5] until these were ceded to Barangay Fort Bonifacio, which was created in 2008.[6]
Ususan is bounded on the north by Rizal, northeast by Martires Del '96 and San Roque in Pateros, on the east by Palingon Tipas, to the southeast by Calzada Tipas and Tuktukan, to the south by Bambang, and on the west by Pinagsama through the Circumferential Road 5.
The exclaves of LogCom is bounded by Pembo on the northeast and Circumferential Road 5 on the southwest. These exclaves once overlapped the former Makati barangays of Post Proper Southside, Pembo, and Rizal.