 According to data from the 2002 Census of Population and Housing, the Treguaco commune had 5,296 inhabitants; of these, 1,245 (23.5%) lived in urban areas and 4,051 (76.5%) in rural areas.At that time, there were 2,788 men and 2,508 women residing in the commune.The commune's population fell by 6% (341 persons) between the censuses of 1992 and 2002 (0.6% annual loss).