Rodriguez is a first-class, urban municipality in the province of Rizal, Philippines. It is the northernmost town in the province and comes after San Mateo, Rizal, and Quezon City coming from Metro Manila. The town is located on the slopes of the Sierra Madre mountain range and features many resorts; it is also the largest town in Rizal province with an area of 312.70 km².
The town's old name, Montalban, refers to its mountainous topography. It was also the town's official name from 1909, until Batas Pambansa Blg. 275 was passed in September 1982, which officially renamed the town. The town's official name is taken from the family name of Eulogio Rodriguez, Sr., one of the most prominent Montalbeños.
According to the latest census, it has a population of 326,668 inhabitants in 65,334 households.
With its fast urbanization and economic growth, the municipality is now part of the Metro Manila built-up area and ranks as the eighth-richest municipality in the Philippines, with an annual income of Php 310 million (2007).
The Municipality of Rodriguez is generally very rough in topography, with 83% of its total land area composed of upland areas, hills and mountain ranges. The remaining 17% low-lying terrain and rolling lands are found at the southwestern portion of the municipality, along with the northern portions of the Municipality of San Mateo.
This gently rolling to rolling slopes comprises the Marikina River
