Santa Catalina Siaton Sibulan Tayasan Valencia Vallehermoso Zamboanguita   Negros Occidental ... Tourism Information On Guihulngan City Guihulngan is a 4th class city in the province of Negros Oriental , Philippines . According to the 2000 census, it has a population of 83,448 people in 17,733 households. City of Guihulngan is