Chilean children attending basic schools exhibit a high prevalence of overweight and obesity, and may present hypertension associated with an excessive sodium intake. The aim of the study was to measure the sodium content of the servings provided by the National Schools Feeding Program to first grade children attending public schools in Quillota during the year 2011, compare the results with the sodium intake recommendation established by WHO, and evaluate the nutritional status and blood pressure (BP). Sodium content of servings (ICP), nutritional status (BMI) and BP (sphingomanometer) of 333 children were measured. Meals contained 3.53+1.42 g sodium per serving. 19.2% of the children were overweight and 21.3% were obese, 7 exhibited pre-hypertension and 1 presented hypertension. The study provides background data related to early sodium exposure that is useful for designing strategies towards the reduction of sodium intake in Chile in order to reduce cardiovascular risk.