Abstract Objectives: to describe the prevalence and factors associated with the consumption of folic acid and iron among puerperal women in the city of São Luís, Maranhão. Methods: a cross-sectional study with 4,036 puerperal women through a standardized questionnaire. The dependent variables (outcomes) were: the consumption of folic acid during pregnancy, iron and folic acid before pregnancy. The independent variables: age; schooling; skin color; marital status; income; planned pregnancy; place and number of prenatal consultations. Statistical analyzes were performed on STATA 14.0. For the first two outcomes, Poisson model with a robust variance was used. And for the last one, logistic regression. Results: the prevalence of consuming folic acid and iron during pregnancy were, respec-tively, 77.27% and 84.98%. However, only 0.37% reported the consume of folic acid and iron before pregnancy. In the adjusted analysis, the variables associated with the consumption of folic acid during pregnancy were: schooling and income; the consume of iron during preg-nancy, age only; and for those who consumed folic acid before pregnancy, no variable was statistically significant. Conclusions: high percentage of puerperal women who consumed folic acid and iron supplements during pregnancy, however, the recommended consumption of folic acid before pregnancy was low and maternal, social and economic factors influence the consumption of these supplements.