San Dionisio is an administrative division in southern Metro Manila, Philippines. It is a barangay at the southwestern edge of Parañaque and north of its border with Manuyo, Las Piñas. The barangay is centered on the westernmost section of Dr. Santos Avenue (former Sucat Road) where it veers north and parallels Elpidio Quirino Avenue (former Calle Real) with De Leon Street and Aldana Avenue forming its boundaries with La Huerta and Manuyo Uno respectively. It extends to the east along the San Dionisio River-Villanueva Creek by barangay Moonwalk to the north and along Balong Creek by Manuyo Dos, Las Piñas to the south towards its border with San Isidro. San Dionisio includes a large swath of the C-5 Road South Extension properties in Parañaque including the Amvel Business Park, Avida Sucat