Norzagaray, officially the Municipality of Norzagaray, is a 1st class municipality in the province of Bulacan, Philippines. According to the 2020 census, it has a population of 136,064 people. It is the location of Angat Dam which sits on the lower realms of the Sierra Madre Mountain range. The Dam is notable for being a major water and power supply for the National Capital Region.