How Do I Apply for U.S. Citizenship Through Naturalization?

February 19, 2026

How Do I Apply for U.S. Citizenship Through Naturalization?

Becoming a U.S. citizen is a major milestone and a lifelong goal for many immigrants. While the benefits of citizenship are significant, the naturalization process can feel overwhelming due to detailed eligibility requirements, extensive paperwork, and a formal interview and testing process.


Understanding how naturalization works—and what steps are involved—can help you move forward with confidence.


What Is Naturalization?

Naturalization is the legal process by which a lawful permanent resident (green card holder) becomes a U.S. citizen. Once naturalized, you gain the right to vote, apply for a U.S. passport, petition more family members, and enjoy protection from removal proceedings.


Who Is Eligible to Apply for U.S. Citizenship?

To apply for naturalization, you must generally meet the following requirements:


  • Be 18 years of age or older
  • Be a lawful permanent resident for at least 5 years
    (or 3 years if married to and living with a U.S. citizen)
  • Have continuous residence in the U.S. during that time
  • Be physically present in the U.S. for at least half of the required period
  • Be able to read, write, and speak basic English
  • Demonstrate knowledge of U.S. history and government
  • Be a person of good moral character
  • Be willing to take the Oath of Allegiance to the United States


Some applicants may qualify for exceptions or waivers, depending on age, length of residence, or disability.


Step 1: File Form N-400

The first step in applying for citizenship is filing Form N-400, Application for Naturalization, with U.S. Citizenship and Immigration Services (USCIS). This form requires detailed information about your:


  • Immigration history
  • Residence and travel
  • Employment
  • Family background
  • Criminal or legal history (if any)


Accuracy is critical. Errors or omissions can delay your case or lead to denial.


Step 2: Attend a Biometrics Appointment

After USCIS receives your application, you will be scheduled for a biometrics appointment, where your fingerprints, photo, and signature are collected. This information is used for background and security checks.


Step 3: Attend the Naturalization Interview

You will then be scheduled for an interview with a USCIS officer. During this appointment, the officer will:


  • Review your N-400 application
  • Ask questions about your background and eligibility
  • Test your English language skills
  • Administer the civics test


The civics test is based on 100 pre-published questions. You will be asked up to 10 questions and must answer at least 6 correctly to pass.


Step 4: Receive a Decision

After your interview, USCIS will issue a decision. Your application may be:


  • Approved
  • Continued (if more information is needed)
  • Denied


If issues arise, an immigration attorney can help respond to requests for evidence or explore next steps.


Step 5: Take the Oath of Allegiance

If approved, the final step is attending a naturalization ceremony, where you will take the Oath of Allegiance and officially become a U.S. citizen.


Common Issues That Can Affect Naturalization

Naturalization applications may be delayed or denied due to:


  • Criminal history
  • Extended travel outside the U.S.
  • Incomplete or incorrect forms
  • Failure to meet residency requirements
  • Problems demonstrating good moral character


Having legal guidance can help address these concerns proactively.


How an Immigration Attorney Can Help

An experienced immigration attorney can:


  • Review your eligibility before you apply
  • Prepare and file Form N-400 accurately
  • Help you prepare for the interview and tests
  • Address potential issues before they become problems
  • Represent you if complications arise


Citizenship and Naturalization Attorney in Kansas City, Missouri

At Martinez Immigration Law LLC, our attorneys assist clients at every stage of the naturalization process. We provide personalized guidance, thorough preparation, and trusted legal support to help you pursue U.S. citizenship with confidence.


Start Your Citizenship Journey Today

Applying for U.S. citizenship is a meaningful step toward securing your future in this country. With the right guidance, the process can be smoother and less stressful.

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