', officially the ' is a of the Philippines| in the province of,. According to the, it has a population of people. Sadanga boundaries both provinces are Abra to the northwest & west and Kalinga to the north & northeast. 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.
Barangays
Sadanga is politically subdivided into 8 barangays.
Anabel
Belwang
Betwagan
Bekigan
Poblacion
Sacasacan
Saclit
Demang
Climate
Demographics
Culture
The town has its indigenous council of elders who make decisions for the indigenous Sinadanga people. The Sinadanga have their own language, called the Sinadanga, which is preserved by the people themselves by using it in homes, schools, and everyday life more than the national language. The Sinadanga language is one of the hardest languages to learn from the Cordilleras. The people also have their own back-strap loom weaving culture, epic chants for planting and harvesting rice, rice terracing practices, indigenous rituals to the gods such as the pumatay, and vernacular house architecture. The most prominent tradition of the Sinadanga people is the enforcement of the teer and closure of the village from visitors. The tradition begins with a meeting of the council of elders within the center of the town. The council negotiates with its members on whether they should close the village or not and when. Once a truce has been made, the elders will drink their traditional wine and one of the elders will announce the decision via public statement, which can be heard throughout the village valley. The tradition is made so that for a period of time, the Sinadanga townsfolk can rest from their traditional work, and can manage to converse and strengthen their bonds with each other through public engagement with their neighbors. The next step after the announcement is made is to establish the faya uy at both sides of the road entrance of the town. The establishment of the faya uy directly puts the town closure in effect, and thus, negates all visitors from visiting the town. The council of elders inputs a guard at the town's entrance and the faya uy to protect the town from unwanted visitors. The faya uy is also the main symbol of the Sindanga's teer. On the imposition of the faya uy, the people are usually seen within the taur or place of public engagement. The faya uy is disestablished on a certain day and time as agreed upon by the council of elders.
Environment
The environment of Sinadanga is serene and clear from garbage as cleanliness for the environment is a norm in Sidanga culture. Sinadanga is home to the Fowa-As falls, a sacred water source. Littering and any other form of destruction within the site, and the entire valley in general, is strictly prohibited.
