San Isidro's 2026 population is now estimated at 3,026. In 2007, the population of San Isidro was 2,804. San Isidro has grown by 33 in the last year, which represents a 1.1% 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 .