How to Become a U.S. Citizen and Eligibility Requirements
Become a U.S. Citizen through Naturalization
Citizenship identifies an individual's national origin. It defines his/her rights and responsibilities to that country (nationality). Most people have only one country of citizenship, but some can have dual nationality. U.S. citizens can be native-born, foreign-born, or naturalized. They owe their allegiance to the United States and are entitled to its protection.
To become a U.S. citizen, you must:
- Meet certain eligibility requirements.
- Be a legal permanent resident of the United States.
- Go through the naturalization process.
Eligibility Requirements to become US Citizen
- Be at least 18 years old at the time you file Form N-400, Application for Naturalization.
- Be a permanent resident (have a “Green Card”) for at least 5 years.
- Demonstrate continuous residence in the United States for at least 5 years immediately before the date you file Form N-400.
- Show that you have been physically present in the United States for at least 30 months out of the 5 years immediately before the date you file Form N-400.
- Show that you have lived for at least 3 months in the state or USCIS district where you apply. Students may apply for naturalization either where they go to school or where their family lives (if they are still financially dependent on their parents).
- Be a person of good moral character.
- Demonstrate an attachment to the principles and ideals of the U.S. Constitution.
- Be able to read, write, and speak basic English.
- Have a basic understanding of U.S. history and government (civics).
- Take an oath of allegiance to the United States.
Take the United States Naturalization Test
One of the requirements in the naturalization process is taking the United States Naturalization Test.
To prepare for the naturalization test, check out these resources:
- 100 Civics Questions and Answers (with MP3 audio)
- Naturalization Test Study Materials - includes study aids for both the civics and English tests.
- Naturalization Self Test - study tool to help you test your knowledge of U.S. history and government.
Certificates of Citizenship and Naturalization are proof of your U.S. citizenship.Certificates of Citizenship and Naturalization
Get a Certificate of Citizenship or Certificate of Naturalization
Apply for a Certificate of Citizenship if you were born abroad to U.S. citizen parents and they did not obtain a Consular Report of Birth Abroad for you before you turned 18.
Foreign nationals receive a Certificate of Naturalization when they become American citizens. Get certified copies of a Certificate of Naturalization.
Replace Your Certificates
Replace your Certificate of Citizenship or Certificate of Naturalization if it was lost or stolen.
If you have further questions, contact U.S. Citizenship and Immigration Services (USCIS).
Back to Top Dual citizenship (or dual nationality) means a person may be a citizen of the United States and of another country at the same time. U.S. law does not require a person to choose one citizenship or another.Dual Citizenship or Nationality
If you are a citizen of another country and have questions about that country's laws, policies, and mandatory military service, contact that country's embassy or consulate.
For information on dual nationality from the point of view of another country, please contact that country's embassy or consulate.
If you have dual citizenship and plan to travel to or from the United States, you must use a U.S. passport to enter and leave the United States.
Information about giving up or losing your U.S. citizenship is also available.
A licensed attorney skilled in citizenship matters can assist you with questions about your situation. A local bar association can often provide a good referral.
Back to Top If you were born in the U.S. and there is no birth certificate on file, you will need several different documents to prove your citizenship:Establish Citizenship Without a Birth Certificate
- A letter from the vital records office in your birth state with your name and what years they searched for your birth certificate.
- A Letter of No Record from the vital records office. You will also need secondary evidence of U.S. citizenship to prove your birth in the United States.
- Your foreign birth record showing your parents' names
- Evidence of your parent(s) U.S. citizenship
- Your parents' marriage certificate
Back to Top You are a U.S. citizen if:U.S. Citizenship for People Born Abroad or in U.S. Territories
- You have a birth certificate issued by a U.S. state or territory. If you were born in a U.S. territory, but do not have a birth certificate issued by that territory, you may be able to verify your citizenship status using other documents.
- You were born outside of the U.S. to at least one U.S. citizen parent and your parent(s) recorded your birth with the U.S. Embassy or consulate in that country:
- If the birth was recorded before your 18th birthday, the Embassy or consulate issued your parent(s) a Consular Report of Birth Abroad (CRBA or Form FS-240); this document is proof of your U.S. citizenship. Learn how to request copies, amendments, or corrections to a Consular Report of Birth Abroad (CRBA or Form FS-240) from the U.S. Department of State (DOS).
- If the Embassy or consulate did not issue a Consular Report of Birth Abroad and you are 18 years of age or older, learn how to get a Certificate of Citizenship from U.S. Citizenship and Immigration Services (USCIS) instead. This document is proof of your U.S. citizenship.