Ulu Paku is a place in Spaoh, within the Betong Division of Sarawak. The people here, just like at Ulu Anyut, are mostly longhouse-dwelling Ibans. Among the longhouses that you can find here include Kerangan Pinggai, Samu, Jukun, Sapuna, Nanga Bong, Danau, Senunok, Penom, Lubuk Kelampu, Nanga Paun and of course, those at Ulu Anyut.