Lawaan, officially the Municipality of Lawaan, is a town in the province of Eastern Samar in the Philippines. It is one of the municipalities that make up the province, which lies within the Eastern Visayas region rather than the Western Visayas. The municipality recorded a population of 13,063 people in the 2024 census.
Among the town's notable features is the Bolusao Watershed Forest Reserve, which is primarily located within Barangay Bolusao. The reserve is one of the protected natural areas associated with the municipality.