The National Survey of WIC Participants (NSWP) study series is designed to describe state and local agency characteristics, examine participants’ characteristics, assess participants’ experiences with WIC, and estimate improper payments resulting from certification errors in WIC. The study is conducted approximately every 10 years, and the current study is the third iteration (NSWP-III) in the series. 

This report addresses actions taken by the Food and Nutrition Service to comply with the Consolidated Appropriations Act 2021 (PL 116-260, HR 116-446), which directs USDA to conduct a review of existing evidence and develop a plan to explore how participation in WIC is associated with maternal mortality, with emphasis on the needs of disadvantaged communities of color.

This study primarily uses 2011–2016 National Health and Nutrition Examination Survey (NHANES) data to examine bivariate relationships between reported WIC participation and outcomes including diet quality, indicators of nutrition and health, food consumption patterns, and nutrient intakes among 1- to 4-year-old children. Most results presented in this report are unadjusted and descriptive only, and do not infer causality. They are intended to contribute to the evidence base needed to inform future research and, subsequently, WIC policy and practice.

This report, the latest in a series of annual reports on WIC eligibility, presents 2018 national and state estimates of the number of people eligible for WIC benefits and the percents of the eligible population and the US population covered by the program, including estimates by participant category. 

​​This report supplements FNS administrative data on total food costs by estimating the average monthly food costs for each WIC participant category and food package type. It also estimates total pre- and post-rebate dollars spent on 18 major categories of WIC-eligible foods in FY 2018.

This study uses the most recent data from the National Health and Nutrition Examination Survey (NHANES) to examine the diets of children who received WIC benefits. The report compares the diets of WIC-participant children to the diets of income-eligible nonparticipant children and higher income children who were not eligible for WIC benefits. 

The purpose of this report is to illustrate the types and amounts of foods being prescribed within the WIC food package for each category of participants. This report does not provide information on redemption of the food prescriptions, or on actual food consumption; at this time, comprehensive data are available only on food prescriptions.

The WIC Participant and Program Characteristics (PC 2004) report summarizes demographic characteristics of WIC participants nationwide in April 2004, along with information on participant income and nutrition risk characteristics. A national estimate of breastfeeding initiation for WIC infants is included. The report also describes WIC members of migrant farm-worker families.

This is a report of the National Academies' Institute of Medicine (Food and Nutrition Board), published here by permission. It is also available on the Institute of Medicine website. In response to many concerns about the WIC food packages, FNS asked the Institute of Medicine to conduct a review of the WIC food packages.

Recently, the method used to calculate the number of individuals eligible for the WIC program was evaluated and an improved methodology was developed. These new, improved estimates provide better insight on the WIC program and should help improve the program in the future. The new estimates show that 13.5 million individuals were eligible for WIC and 7.7 million participated in WIC in 2003. This coverage rate of 57% is consistent with trends since 2000 and is similar to the coverage rate found in the Food Stamp Program.