The aim of this study was to determine the prevalence of the nutritional status and to see if there is a difference in the number of children of early and preschool age in relation to the category of nutrition. The study involved 69 children, 33 girls and 36 boys, from kindergarten Rijeka. The children was measured the body height and body weight based on which the body mass index (ITM) was calculated. Body mass index was compared with the tabular values of the International Classification of Body Mass Index for Children and Adolescents developed by Cole et al., (2000) to determine the nutritional status of children. The results show that 59% of children are normal weight, 26% of children are overweight, while 15% are obese. Out of the total number of children, 50% of boys were normal weight, 36.1% were overweight and 13.9% were obese. The girls are in a better position than boys in terms of normal nutrition. Accordingly, 69.7% of girls were normal weight, but 15.1% were estimated to be obese. 15.2% of the girls were overweight. The biggest difference in the nutritionl status of boys and girls was in groups of normal and excessive body mass, while in the group of obese, the number of girls and boys was almost the same. Of the total sample, there were no children who were malnourished. This study has shown that the problem of these issues exists already in early and preschool upbringing and education. The data are very worrying, especially because there is already a significant percentage of obese children in both sexes. Future studies should focus on finding ways and concrete measures (intervention programs) to be taken in early and preschool upbringing and education to prevent further increase in the number of children who fall into the categories of overweight and obesity.