Libertad Mabinay Manjuyod Pamplona San Jose Santa Catalina Siaton Sibulan Tayasan Valencia Vallehermoso Zamboanguita     Tourism Information On Tayasan Tayasan is a 4th class municipality in the province of Negros Oriental , Philippines . According to the 2000 census, it has a population of 30,477 people in 6,374 households. Tayasan