Background: Poor cognitive performance in children has been associated with several risk factors associated with low socioeconomic status, such as the level of parental education and particularly low maternal education, malnutrition, micronutrient deficiencies and a less stimulating environment for children. The CIID has the same principles as other nonverbal IQ tests, correlates well with the WISC and has excellent psychometric qualities. Aim: to investigate the relationship between sociodemography and nutritional status with cognitive level of elementary school children in Padang Timur District using CIID. Methods: Analytical research with a cross sectional study design from February to May 2022 on elementary school children in Padang Timur, Padang city. Results: There is a relationship between the cognitive level of elementary school children with nutritional status, mother's education, family income and father's education. Conclusion: The most important factor in influencing a child's cognitive level is nutritional status. Keywords: cognitive, sociodemographic, nutritional status