What are the Nine Standard Eligibility Requirements to Become a U.S. Citizen?

You are at least 18 years of age at the time of filing (except active duty members of the U.S. Armed Forces);
You are a permanent resident of the United States for a required period of time;
You have lived within the state or USCIS district where you claim residence for at least 3 months prior to filing;
You have demonstrated physical presence within the United States for a required period of time;
You have demonstrated continuous residence for a required period of time;
You demonstrate good moral character;
You demonstrate an attachment to the principles and ideals of the U.S. Constitution;
You demonstrate a basic knowledge of U.S. history and government (also known as “civics”) as well as an ability to read, write, speak and understand basic English; and
You take an Oath of Allegiance to the United States. Some applicants may be eligible for a modified oath.