Objective: iron deficiency anemia is associated with adverse results for health and it is highly prevalent worldwide. The current study evaluated the prevalence and the sociodemographic factors associated with iron deficiency anemia in a sample of Colombian pregnant women. Materials and methods: the secondary analysis for the obtained information at the National Nutrition Survey (ENSIN) 2010 of Colombia in a probabilistic sample of 1,385 pregnant women between 13 and 49 years old. Hemoglobin concentration, ferritin plasmatic levels