Pathway

French Citizenship for Siblings of Citizens

France Citizenship

Updated October 8, 2026

Pathway overview

At a glance

An adult born and raised in France may qualify for a citizenship declaration if a brother or sister became French through the country's birth-and-childhood-residence rules. This is a narrow category; having a French sibling through another route is not enough.

Who can apply: Born in France and living there habitually and lawfully since age 6
Sibling: Became French under the specified France-born child rules
Schooling evidence: School certificates must cover the required compulsory-school period in France

Summary

France has a citizenship-by-declaration route for people in a specific France-born family situation involving a French brother or sister. It is not a general sibling route for anyone with a French brother or sister.

This is not citizenship sponsorship by any French sibling. The sibling must have been born in France to foreign parents and acquired French nationality automatically at 18 or by the related declaration available from age 13 or 16. The applicant must also have been born in France, lived there habitually and lawfully since age 6, and completed compulsory schooling in France in schools subject to state control.

Eligibility

The French sibling generally must:

have been born in France to foreign parents; and
have become French automatically at 18 under Article 21-7, by personal declaration from age 16, or by a parent's declaration from age 13 under Article 21-11.

The applicant generally must:

be at least 18;
have been born in France;
live in France when making the declaration;
have lived in France habitually and lawfully since age 6;
have completed compulsory schooling in France, generally from the school year beginning at age 6 through age 16, without an unexplained gap, in an institution subject to French state control;
hold a current residence document if required; and
have no applicable serious-conviction, removal-order, territorial-ban, or public-order bar.

The siblings may share one or both parents, but the family link must be proved through full birth, marriage, and other family records. The applicant also needs official proof of how the sibling became French; a current French passport alone may not show the legal basis.

Check how the sibling became French before reviewing the applicant

Establish the sibling's qualifying acquisition Prove French nationality under the specified birth-and-childhood-residence provisions.
Document the applicant's own history Establish French birth, adult age, and habitual legal residence since age six.
Prove the required schooling and current conditions Prepare the complete compulsory-school record and other declaration evidence.

A sibling who became French through another route does not establish this ground. Both siblings' specific histories matter.

What This Route Allows

If the declaration is accepted and registered, the applicant becomes French from the effective date of the declaration. The person can obtain updated family-status evidence, a French identity card, and a passport.

Eligible unmarried minor children who live with the applicant may sometimes benefit from collective effect if properly named and documented in the declaration.

What This Route Is Not

This is not a family-reunification route and does not apply merely because a brother or sister is French. A sibling who naturalized by decree, became French through marriage, inherited French nationality from a parent, or was adopted may be French but does not supply the specific sibling basis this declaration requires.

It is not available to an applicant born outside France, one who moved to France after age 6, or one who did not complete the required schooling in France. Long adult residence cannot repair those childhood conditions for this route, though ordinary naturalization may be possible.

Next Steps

Obtain both siblings' full birth certificates and the parent records proving their relationship.
Obtain a certificate, registered declaration, annotated birth record, or other official evidence showing that the sibling became French under Article 21-7 or 21-11.
Create a complete residence timeline from the applicant's sixth birthday to the filing date, supported by residence permits and dated records.
Request school certificates covering the entire compulsory-school period, including any transfers between schools.
Gather the applicant's valid residence document, criminal records, and evidence addressing any absences from France.
Check legalization (official checks confirming a document's origin for use abroad)/apostille (a certificate verifying an official signature or seal for use abroad) and approved-translation requirements for foreign family records.
Use the current official form and file through the responsible nationality platform for the applicant's home in France.

French Citizenship for Siblings of Citizens

At a glance

Summary

Eligibility

What This Route Allows

What This Route Is Not

Next Steps

Stay up to date on this pathway

Explore other pathways

French Citizenship by Marriage

French Citizenship: Parent or Grandparent

French Citizenship by Birth in France

Sources