Zip Code / Postal Code of Guiuan, Eastern Samar

Guiuan ([ˈgiˌwan] ; Waray: Bungto han Guiuan, Filipino: Bayan ng Guiuan), officially the Municipality of Guiuan, is a 2nd class municipality in the province of Eastern Samar, Philippines. It constitutes the southeastern extremity of Samar Island and some adjacent islands, surrounded by Leyte Gulf and the Philippine Sea (which a marginal sea of the Pacific Ocean), two major bodies of water that makes the town the surfing capital of the Visayas. According to the 2020 census, it has a population of 53,361 people, making it the most populous municipality in Eastern Samar (followed by Dolores) and the second most populous administrative division in the entire province after the capital city Borongan. Guiuan played a significant part in Philippine history.
Source: Wikipedia