This article assess the relationship between children’s experience of food insecurity and nutrient intake from food and beverages among Mexican-origin children (ages 6-11 years) who resided in Texas border colonias. Child food security measures and 24-hour dietary recall data were collected in Spanish by trained promotora-researchers. Researchers found that 64 percent of children reported low or very low food security. Few children met recommendations for calcium, dietary fiber, and sodium; and no children met the recommendations for potassium or vitamin D. Weekend intake for calcium, vitamin D, potassium, and vitamin C were significantly lower than weekday consumption, and combined percentage from fat and added sugar were significantly higher on weekends than weekdays. Children who were identified with low food security consumed significantly less calcium and vitamin D on the weekends, compared with weekdays, and very low food security children consumed a greater percentage of calories from fat on weekends than weekdays. Three-day average dietary intake of total calories, protein, and percentage of calories from saturated fat and added sugar were significantly associated with reduced food-security status. Very low food security was associated with greater intakes of total energy, calcium, and percentage of calories from added sugar.