Be at least 18 years old: The applicant must be at least 18 years old at the time of filing the application for naturalization.
Be a lawful permanent resident (green card holder): The applicant must have held a valid green card for a specified period of time. Generally, this is five years for most applicants, but it may be reduced to three years for those married to a U.S. citizen.
Continuous residence: The applicant must have continuously resided in the United States for a specified period of time. This is generally five years but may be reduced to three years for those married to a U.S. citizen.
Physical presence: The applicant must have been physically present in the United States for a specific number of days within the continuous residence period. Generally, this is at least half of the required continuous residence period.
Good moral character: The applicant must demonstrate good moral character during the required period of continuous residence. This includes not committing certain crimes and maintaining good conduct.
Basic knowledge of U.S. government and history: The applicant must pass a civics and English language test to demonstrate knowledge of U.S. government and history.
Attachment to the principles of the U.S. Constitution: The applicant must swear allegiance to the United States and demonstrate their willingness to support and defend the principles of the U.S. Constitution.
Application and interview: The applicant must file an application for naturalization and attend an interview with a U.S. Citizenship and Immigration Services (USCIS) officer. They must demonstrate their eligibility for naturalization and provide supporting evidence.
Oath of allegiance: If approved, the applicant must take an oath of allegiance to the United States in a formal naturalization ceremony.
There may be additional requirements or exceptions depending on individual circumstances, such as military service or special provisions for certain groups. It is important to consult the USCIS website or an immigration attorney for the most up-to-date and specific information regarding naturalization requirements.