 According to the 2002 census of the National Statistics Institute, Olivar spans an area of and has 12,335 inhabitants (6,244 men and 6,091 women).Of these, 7,898 (64%) lived in urban areas and 4,437 (36%) in rural areas.The population grew by 8.9% (1,003 persons) between the 1992 and 2002 censuses.