El Rosario's 2026 population is now estimated at 1,592. In 2007, the population of El Rosario was 1,339. El Rosario has grown by 12 in the last year, which represents a 0.76% annual change. These population values and projections come from DIGESTYC Censo de Poblacion y Vivienda 2007 poblacion por municipio and ONEC-DIGESTYC proyecciones municipales de poblacion 2020-2030 revision 2021 .