The main objective was to determine the relationship between demographic and nutritional characteristics with anemia in children under 5 years old at Health Post I-1 Santa María del Ojeal, Iquitos 2024. The research was quantitative, non-experimental, descriptive, cross-sectional, and correlational. The sample consisted of 95 children under 5 years old who attended growth and development consultations at Health Post I-1 Santa María del Ojeal, Iquitos. The technique used was an interview, and the instrument was a data collection form for demographic, nutritional characteristics, and identifying the level of anemia in children under 5 years old. Data processing was carried out using the SPSS statistical software version 27.0, and the chi-square test (χ²) was used for correlation analysis. The results regarding demographic characteristics showed that 41.1% were preschoolers and 52.6% we...