San Buenaventura's 2026 population is now estimated at 4,345. In 2020, the population of San Buenaventura was 4,442. San Buenaventura experienced a decrease of -3 residents over the past year, marking an annual decline of -0.07%. These population values and projections come from ONEC-DIGESTYC proyecciones municipales de poblacion 2020-2030 revision 2021 .