Maslog, officially the Municipality of Maslog (; ), is a municipality in the province of Eastern Samar, Philippines. According to the 2024 census, it has a population of 5,438 people, making it the least populated town in the province and in the Visayas.
Maslog is politically subdivided into 12 barangays. Each barangay consists of puroks and some have sitios.
The population of Maslog in the 2024 census was 5,438 people, with a density of .