To apply for U.S. citizenship through naturalization, you must first meet eligibility requirements, such as being a lawful permanent resident for at least 5 years or 3 years if married to a U.S. citizen. Once eligible, you file Form N-400 with U.S. Citizenship and Immigration Services, along with the required fee and supporting documents. You will then attend a biometrics appointment, complete an interview, take an English and civics test (unless exempt), and, if approved, attend a naturalization ceremony where you take the Oath of Allegiance.

Becoming a U.S. citizen starts with having a green card for several years. Once eligible, you fill out an application called Form N-400, pay the fee, and send it to immigration services. They’ll ask you to come in for fingerprinting and then schedule an interview. During the interview, they’ll test your English and knowledge of U.S. history. If you pass and get approved, you’ll be invited to a special ceremony where you swear loyalty to the U.S. and become a citizen

U.S. citizenship is a powerful milestone. If you've had your green card for several years and meet other requirements like speaking English and knowing U.S. history, you can apply by filing Form N-400 with USCIS. After submitting your application, you’ll be fingerprinted and later interviewed. During the interview, you’ll be asked questions about your background and take a test. If you pass and are approved, you’ll attend a naturalization ceremony, take the oath, and become a U.S. citizen.