The Food and Nutrition Service administers the WIC program at the federal level; state agencies are responsible for determining participant eligibility and providing benefits and services, and for authorizing vendors.
To apply to be a WIC participant, you will need to contact your state or local agency to set up an appointment. Check out your state's website or call the toll-free number. When you call to set up an appointment, someone will tell you the location nearest your home and what you need to bring with you.
To apply to be a WIC vendor, you will need to contact your state agency.