FNS provides historical summaries and annual and monthly state-level and national-level program data in each program area.
For SNAP, an annual Characteristics report contains information about program participants, and an annual Participation report estimates participation as a percentage of those who are eligible. FNS has an interactive map with SNAP Community Characteristics organized by State. An interactive motion chart of SNAP participation dynamics is available from Tufts University.
For WIC, there also is an annual Participant and Program Characteristics report.