Santa Maria Ostuma's 2026 population is now estimated at 7,294. In 2007, the population of Santa Maria Ostuma was 5,990. Santa Maria Ostuma has grown by 41 in the last year, which represents a 0.57% 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 .