Sison, officially the Municipality of Sison, is a municipality in the province of Surigao del Norte, Philippines. According to the 2020 census, it ha…Sison, officially the Municipality of Sison, is a municipality in the province of Surigao del Norte, Philippines. According to the 2020 census, it has a population of 14,290 people. Through Executive Order No. 357, issued by President Carlos P. Garcia on September 15, 1959, six barrios of then-municipality of Surigao were organized into the municipality of Sison.