Río Azul DistrictRío Azul is a district of the La Unión canton, in the Cartago province of Costa Rica.HistoryRío Azul was created on 15 July 1968 by Ley 4148. Segregated from San Diego.GeographyRío Azul has an area of km² and an elevation of metres.DemographicsFor the 2011 census, Río Azul had a population of inhabitants.TransportationRoad transportationThe district is covered by the following road routes: National Route 409