Kasibu, officially the Municipality of Kasibu, is a municipality in the province of Nueva Vizcaya, Philippines. According to the 2020 censu…Kasibu, officially the Municipality of Kasibu, is a municipality in the province of Nueva Vizcaya, Philippines. According to the 2020 census, it has a population of 41,776 people. Kasibu in the Ilongot language means, "a venue where people settle their differences."