Hernani, Eastern Samar

', officially the ' (; ), is a in the province of , . According to the , it has a population of people.
It was formerly called Nag-as, after the name of the river flowing southeast of the town center.
Barangays.
Hernani is politically subdivided into 13 barangays. Four barangays, located in the poblacion, are known primarily by number:
Demographics.
The population of Hernani in the was people, with a density of .