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Resource | Research and Data | Breastfeeding National and State Level Estimates of WIC Eligibility and Program Reach in 2020

These graphics, the latest in a series of annual reports on WIC eligibility, present 2020 national and state estimates of the number of people eligible for WIC benefits and the percentages of the eligible population and the US population covered by the program, including estimates by participant category.

01/09/2023
Resource | Research and Data | Benefit Content/Cost WIC Vendor Management Study: 2015 EBT Pilot

The WIC Vendor Management Study: 2015 Electronic Benefits Transfer (EBT) Pilot examined compliance with program requirements and rates of violations among WIC EBT vendors in 2015 and tested a method to identify and measure errors that contribute to improper payments in an EBT environment.

08/10/2022
Resource | Research and Data Report on the WIC Task Force on Supplemental Foods Delivery

The following report addresses actions taken by FNS to comply with the Consolidated Appropriations Act 2021 which directed USDA to establish a Task Force to study measures to streamline the redemption of WIC benefits in a manner that promotes convenience, safety, and equitable access to WIC supplemental foods for participants in the WIC program.

12/10/2021
Resource | Research and Data | Assessing/Improving Operations WIC Vendor Peer Group Study

The purpose of this study is to evaluate the effectiveness of state agencies current peer group systems, and to provide guidance to state agencies on how to evaluate and update their systems. Specifically, it uses empirical analysis to identify one or more effective models for establishing vendor peer groups that could apply to most state agencies.

05/31/2017
Resource | Research and Data | General/Other Examination of Cash Nutrition Assistance Program Benefits in Puerto Rico

The Nutrition Assistance Program in the Commonwealth of Puerto Rico provides a monthly benefit for food to low-income households that includes both cash and noncash portions. Three-fourths (75 percent) of the benefit must be redeemed for eligible food items through electronic benefit transfer (EBT) at certified retailers. The remaining 25 percent may be redeemed in cash. The entire benefit (both the noncash and cash portions) is to be used only for the purchase of eligible food items.

08/17/2015
Resource | Research and Data | Payment Accuracy and Program Integrity 2013 WIC Vendor Management Study

This study is part of a larger FNS effort to ensure WIC program integrity and to comply with the Improper Payments Information Act of 2002 which requires FNS to estimate improper payments in its programs.

11/26/2013
Resource | Report to Congress Food Assistance: Research Provides Limited Information on the Effectiveness of Specific WIC Nutrition Services

This report (1) identifies the number and nature of recent studies that have examined the effectiveness of three WIC services—nutrition education, breastfeeding promotion and support, and referral services—and (2) summarizes what the research shows about the effectiveness of these specific nutrition services. 

03/01/2001
Resource | Report to Congress Food Assistance: Performance Measures for Assessing Three WIC Services

GAO Report to Congressional Committees on Food Assistance: Performance Measures for Assessing Three WIC Services

02/01/2001
Resource | Report to Congress Food Assistance: Financial Information on WIC Nutrition Services and Administrative Costs

GAO Report to Congressional Committees on Food Assistance: Financial Information on WIC Nutrition Services and Administrative Costs

03/01/2000
Page updated: September 16, 2025