BACKGROUND: Childhood obesity and hypertension (HTN) are among serious global health concerns. Since risk factors of cardiovascular diseases (CVDs) should be managed early in life and there is little information about children under the age of 6 in the community, the study was designed aiming to address these issues.METHODS: This cross-sectional study was performed on 1,091, 3-6-year-old children in Gorgan City, located in north of Iran. Height, weight, body mass index (BMI), and blood pressure were measured using standard techniques. All statistical tests were conducted using the Statistical Package for the Social Sciences (SPSS) for windows.RESULTS: Given the study, respectively 3.8 and 4.5% of the boys and girls were underweight, 17.4 and 16.5% of the boys and girls were overweight, and 20.8 and 19.3% of the boys and girls were obese. In addition, 3.4, 0.7, and 0.4% of the subjects had presystolic, systolic, and prediastolic HTN, respectively. There is a significant linear relationship between BMI and systolic and diastolic blood pressures. It was found that the risk of obesity in mothers with college education was estimated to be almost 5 times higher than in mothers with lower levels of education.CONCLUSION: Compared to the values announced by Centers for Disease Control and Prevention (CDC), the mean height, weight, and BMI of children in our study was higher. Educational interventions should be considered in society, especially for mothers with a high level of education and employed ones. It is recommended that blood pressure measurements, especially in obese children, be carefully considered at each pediatric visit so that children with HTN could be quickly identified and treated.