Kiangan, officially the Municipality of Kiangan is a 4th class municipality in the province of Ifugao, Philippines. According to the 2020 census, it has a population of 17,691 people. Kiangan is the oldest town in the province. It derives its name from Kiyyangan, an ancient village near the bank of the Ibulao River across the Lagawe valley. The name Kiyyangan is enshrined in Ifugao mythology and is believed to be the dwelling of Wigan and Bugan, the mythological ancestors of the Ifugao. It was the former capital of Ifugao until the topology was deemed unfit and moved to neighboring Lagawe.