Objectives: Studying epidemiological criteria deficiency of iron and iodine at the population of Tyumen, on a background of iodine preventive maintenance. Methods: Because iron deficiency may impair the efficacy of iodine supplementation, the aim of this study was to determine the relation between serum ferritin and goiter, urinary iodine following iodized salt supplementation. Schoolboys are included in conformity to recommendations the WHO (1997) in 9—12 years old children (n = 435.). Results: On a background of preventive actions at the Tyumen schoolboys sufficient iodine maintenance (frequency of a craw is determined according to ultrasonic — 1.9%, a median urinary iodine — 113 mkg/l). The average level serum iron has made 13 ± 6.2 mg/dl, serum ferritin — 38.6 ± 30.9 mg/dl. At 30 % of schoolboys deficiency of iron is determined. Conclusion: In conditions compensated endemic goiter authentic correlation between criteria of an exchange of iron and parameters of iodine maintenance it is not established. Key words: iodine deficience, thyroid, goiter, iron, anemia.