San Mateo (Filipino: Bayan ng San Mateo) is a first class urban municipality in Rizal Province, Philippines. Located on the island of Luzon, San Mateo is one of 13 municipalities and a capital city that make up the Province of Rizal. It is also part of the Metro Luzon Urban Beltway, that is composed of Region 3, Region 4-A (CALABARZON) and the nearby National Capital Region (NCR).

San Mateo is located along the western border of Rizal Province, it is bordered on the west by Quezon City, to the south by Marikina City and Antipolo City, the capital of Rizal Province, and to the north by Rodriguez (Montalban) also in Rizal province. It is approximately 24 kilometres (15 mi) away from Manila and 11 kilometres (6.8 mi) north of Pasig City, the former town capital of Rizal.

According to the 2007 Philippine census, San Mateo has population of 184,860 inhabitants, or 8.09% of the total population of Rizal. Conurbated to the urban agglomeration of the Greater Manila Area, San Mateo is one of the fastest growing municipalities in Rizal Province, according to the Metropolitan Manila Development Authority (MMDA) and the Provincial Government of Rizal.

Rizal is a province located in the CALABARZON, just 16 kilometers east of Manila. The province was named after the country's national hero, José Rizal. Rizal Governor Dr. Casimiro Ynares III on June 17, 2008 announced the transfer of the Capitol from Pasig. Its P 270-million capitol building, constructed in Antipolo by Ortigas & Co., owner thereof, was completed by December of that year. Built on 5-hectare lot at the Ynares Center, it employs 2,008 employees. The New Capitol was successfully inaugurated on March 4, 2009, bringing back the Capitol Building inside the provincial territory, from which it was absent for 33 years (when Pasig was incorporated into Metro Manila).

Rizal is bordered by Metro Manila to the west, the province of Bulacan to the north, Quezon to the east and Laguna province to the south. The province also lies on the northern shores of Laguna de Bay, the largest lake in the country.

Rizal is a mountainous province perched on the western slopes of the southern portion of the Sierra Madre mountain range. Antipolo City boasts of a wonderful view of Metro Manila and it is where Hinulugang Taktak, a waterfall popular with tourists, can be found.

San Mateo, Spanish for Saint Matthew, is the name of several places:

San Mateo may also refer to: