If you have been living in the United States as a lawful permanent resident and you are interested in obtaining U.S. citizenship, you will need to go through the naturalization process.

Requirements for Naturalization include:

• Continuous residence in the US for the last five years (3 years if applying based on marriage to U.S. citizen).
• Physical presence within the U.S. for a total of at least one half of the period of required continuous residence.
• The ability to read, write and speak ordinary English unless they are physically unable to do so due to a disability such as being blind or deaf, or suffer from a developmental disability or mental impairment. *Exceptions for those over 50 years old.
• A basic understanding of the fundamentals of U.S. history and
  government.
• Good moral character and an affinity for the principles of the U.S. Constitution. The Government will consider your criminal history.
• Applicants should be at least 18 years of age at the time of filing.