Catarman, officially the Municipality of Catarman, is a municipality and capital of the province of Northern Samar, Philippines. According to t…Catarman, officially the Municipality of Catarman, is a municipality and capital of the province of Northern Samar, Philippines. According to the 2020 census, it has a population of 97,879 people. It is the commercial, educational, financial, and political center of the province. It is the most populous municipality in Eastern Visayas.