Derived Citizenship Explained: How Children Automatically Become U.S. Citizens

Derived citizenship, also called derivative citizenship or citizenship through derivation, is when a child automatically becomes a U.S. citizen through the naturalization of a parent, without filing a separate naturalization application.

There are different ways for a child obtain citizenship through parents. An important distinction is that derived citizenship occurs after birth. A child may derive citizenship automatically under specific conditions outlined in U.S. immigration law.

The Child Citizenship Act of 2000 significantly changed how children obtain U.S. citizenship through their parents. For most families today, the CCA is the key law that governs derived citizenship.

Under the CCA, effective February 27, 2001, a child automatically becomes a U.S. citizen if all the following conditions are met on or after that date:

1. The child is under 18 years of age (born on or after February 27, 1983).
2. The child is a lawful permanent resident (green card holder).
3. At least one parent is a U.S. citizen (by birth or naturalization).
4. The child resides in the legal and physical custody of the U.S. citizen parent.

If all of these requirements are met, the child automatically becomes a U.S. citizen on the day the last condition is satisfied. The order of events makes no difference.

To determine whether a child qualifies for derived citizenship, you must evaluate timing, custody, and immigration status.

Here are examples of children who generally do qualify:

• A child who immigrated with both parents and one later naturalized.
• A child who immigrated with one parent, who later naturalized, and had legal custody.
• A child adopted from another country who became a lawful permanent resident and met the conditions under the CCA.

Important Notes:

• Derived citizenship does not apply if the child is over 18 when the parent naturalizes.
• The child must have permanent resident status (green card) when the parent naturalizes.
• If parents divorce, legal and physical custody must be with the naturalized parent.
• Derived citizenship is automatic. There is no need to file Form N-400.

When requesting a document to prove derived citizenship, the applicant will generally submit the following items:

• Signed Form N-600, Application for Certificate of Citizenship
• USCIS filing fee
• Two passport-style photos of child
• Child’s birth certificate
• Child’s permanent resident card
• U.S. citizen parent’s birth certificate
• Parent’s Certificate of Naturalization
• Parent’s marriage certificate
• Evidence of child’s legal and physical custody with the U.S. citizen parent

Children born out of wedlock or with parents who have separated may have additional requirements.

CitizenPath makes the application process easier and makes sure you do it correctly. In addition to your prepared form, CitizenPath provides you with a detailed checklist of supporting documents and directions on how to organize your application. Start for free and pay only when you’re ready to file. Learn more about the Citizenship Certificate Package →

If a child does not meet the requirements for derived citizenship under the CCA — such as being over 18 at the time of the parent’s naturalization — they may still have options:

• Naturalization (Form N-400): The child may qualify to apply for naturalization on their own.
• Adjustment of Status (Form I-485): If the child is not yet a lawful permanent resident, this step must happen before pursuing derived citizenship.

CitizenPath can help you determine the best route forward and make the process smoother.

Understanding the differences between naturalized, acquired, and derived citizenship can help you identify the right path to U.S. citizenship — or confirm if you or your child already qualify. This chart breaks down the key distinctions.

Understanding how the Child Citizenship Act of 2000 applies can be tricky. These examples show how derived citizenship works in common situations: