Mabinay is a 3rd class municipality in the province of Negros Oriental, Philippines. As of the 2000 census, it has a population of 64,451 people in 13,357 households. It is politically subdivided into 32 barangays. A municipality (bayan in Filipino) is a local government unit in the Philippines. ... Negros Oriental is a province of the Philippines located in the Central Visayas region. ... 2000 is a leap year starting on Saturday of the Gregorian calendar. ... A barangay is the smallest local government unit in the Philippines and is very similar to a village. ...