The Diversity Immigrant Visa program is a United States congressionally mandated lottery program for receiving a United States Permanent Resident Card. It is also known as the Green Card Lottery. The lottery stage of the process is completely free and is administered on an annual basis by the Department of State. The lottery provides for a new class of immigrants known as "diversity immigrants" (DV immigrants). The Act makes available 55,000 permanent resident visas annually to natives of countries deemed to have low rates of immigration to the United States. To learn about this years lottery go here.
NOTE: Every year there are fraud schemes related to the DV lottery. Please read the warnings posted on the U.S. State Department website. Please check with OISS if you have any doubts about the authenticity of mail or e-mail requests you get regarding the DV lottery.