Zacatecoluca's 2026 population is now estimated at 85,215. In 2007, the population of Zacatecoluca was 65,826. Zacatecoluca has grown by 763 in the last year, which represents a 0.9% 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 .