The City of Calbayog is situated in the western part of the island of Samar. It lies just along the coastal region of the province stretching about 60 miles from the northern tip of the island and 180 miles from the southern boundaries. Calbayog City comprises 157 barangays. Compared with other Municipalities of Samar, Calbayog City has the largest area that even surpasses that of Catbalogan, the capital of the Province.

Calbayog City has a total land area of 90,300 hectares which is .301% of the archipelago’s total land area, 4.21% of the regional land area, 6.724 % of Samar Island and 16.10% of the land area of Samar Province. land area of Samar Province.