Balangkayan (IPA: ]), officially the Municipality of Balangkayan (; ), is a municipality in the province of Eastern Samar, Philippines. According to the 2024 census, it has a population of 10,014 people.
Balangkayan is politically subdivided into 15 barangays. Each barangay consists of puroks and some have sitios.
In the 2024 census, the population of Balangkayan was 10,014 people, with a density of .
The Minasangay Island Marine Ecological Park and Resort known for its cliff diving, scuba diving, mangroves and coral reefs is a popular gateway for the locals of the province.
Balangkayan has many elementary schools and secondary schools.
Elementary schools:
Secondary school: