This report provides eligibility estimates for the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC), which serves low-income infants, children under age 5, and pregnant and postpartum women by providing access to nutritious foods, nutrition education, and referrals to other services. Using survey data for 2013, we found that 14.2 million individuals were eligible for WIC in an average month, including 61 percent of all infants. Overall, 60.2 percent of eligible people participated. Infants had the highest coverage rate (84.4 percent). The report also gives estimates of eligibility and coverage rates across states and over time.