The different paths to citizenship are through:
Involved U.S. government agencies
Department of Homeland Security (DHS)
United States Customs and Immigration Service (USCIS)
USCIS oversees all lawful immigration to the U.S. Its 18,000 employees in over 250 offices around the world manage citizenship applications, family reunification, green cards, and work visas. The stated mission of the USCIS is to secure America’s promise as a nation of immigrants by providing accurate and useful information, granting immigration and citizenship benefits, promoting an awareness and understanding of citizenship, and ensuring the integrity of our immigration system.
In practice, however, USCIS, with its detailed rules and novel-length forms, can intimidate. That is why you should avail yourself of a good immigration attorney to simplify the process and maintain legal status. You can also learn more about the immigration process elsewhere on this site: