1,800 (2001 SIL). 10–20 monolinguals. Ethnic population: 1,800.
Amazonas Department, Mirití-Paraná (tributary Caquetá); La Pedrera on lower Caquetá, Ararcuara; Leticia.
In some traditional ceremonies ritual language used, mostly unintelligible even to those who have learned it.
Local subversive activity caused some Yucuna to move to other areas. Traditional religion, Christian.