Rodriguez, officially the Municipality of Rodriguez and commonly known by its former name Montalban, is a 1st class urban municipality in the province of Rizal, Philippines. According to the 2020 census, it has a population of 443,954 people making it the most populous municipality in the country. Pending an affirmation through plebiscite, Republic Act No. 11812 repealed Batas Pambansa Blg. 275 and intend to formally revert to its original municipal name Montalban.