Federal Student Aid, a part of the U.S. Department of Education, is the nation's largest provider of student financial aid. The Office of Federal Student Aid provides more than $120 billion in federal grants, loans, and work-study funds yearly to more than 13 million students paying for college or career school.
A note of caution: Some companies offer to complete your FAFSA for you for a fee (sometimes a very high fee). Before paying for someone else to complete your FAFSA, try it yourself; it isn't complicated.