Sadanga, officially the Municipality of Sadanga is a 5th class municipality in the province of Mountain Province, Philippines. According to the 2020 census, it has a population of 8,427 people. The municipality is the only place in the world where the Sinadanga language is used. The language is highly significant in the Sinadanga culture, making its conservation an utmost importance to the survival of the Sinadanga people's traditions.