Kawayan, officially the Municipality of Kawayan, is a municipality in the province of Biliran, Philippines. According to the 2020 census, it has …Kawayan, officially the Municipality of Kawayan, is a municipality in the province of Biliran, Philippines. According to the 2020 census, it has a population of 20,455 people. According to the Philippine Statistics Authority, the municipality has a land area of 61.02 square kilometres constituting 11.38% of the 536.01-square-kilometre- total area of Biliran.