San Julian's 2026 population is now estimated at 24,603. In 2007, the population of San Julian was 18,648. San Julian has grown by 156 in the last year, which represents a 0.64% 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 .