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.

The purpose of this study was to identify barriers to retention of infants and children on WIC; that is, to identify barriers that deter parents/caretakers from continuing to participate in WIC, despite the continued eligibility of their infant or child.

This report describes Native American participation in WIC based on data collected by the biennial WIC Participant and Program Characteristics Studies in 1992, 1994, 1996, and 1998. The report presents information on the geographic distribution, demographic characteristics, health status, and public health concerns of low-income Native American women, infants, and children participating in the WIC program on and off reservations; describes Native American Tribes and the role of tribal governments in administering WIC programs; compares the characteristics of Native American WIC enrollees with all WIC enrollees; and examines the health status of Native American WIC enrollees.

WIC seeks to improve fetal development and reduce the incidence of low birthweight, short gestation, and anemia through intervention during the prenatal period. This publication is the seventh report in the series of studies on WIC participants and program characteristics.

This is a report of the National Academies' Institute of Medicine (Food and Nutrition Board), published here by permission. This report seeks to evaluate the use of various dietary assessment tools and to make recommendations for their use in identifying individuals who are at dietary risk.

This study was designed to describe the characteristics of adolescent women in WIC, as well as to identify their special needs, such as nutrition education, referral to other agencies, and their satisfaction with the services they received.