Silangan is a barangay of the philippine municipality San Mateo in the province Rizal in CALABARZON which is part of the Luzon group of islands. The municipality San Mateo with a population of about 184,860 and its 15 barangays belongs to the urban areas in the Philippines. Silangan had 25,504 residents by the end of 2007.
Silangan belongs to the barangays of Municipality San Mateo which are in the outlying area.
Other barangays of San Mateo are: