Children born in Spain to foreign parents: Are they citizens?
- Spain follows jus sanguinis (right of blood), not jus soli (right of soil): children born in Spain to foreign parents do not automatically acquire Spanish nationality.
- Automatic nationality at birth is available under Article 17 of the Civil Code in three narrow circumstances: stateless parents, parents whose national law does not transmit nationality to the child, or where at least one parent was also born in Spain.
- The most practical route for most children born in Spain to foreign parents is Article 22.2(a) of the Civil Code: Spanish nationality by residence after just one year of legal stay.
- Spain does not formally recognise dual nationality with most countries, including the United Kingdom, the United States, and Germany.
- Children who acquire Spanish nationality by residence may, in practice, hold two passports, but Spanish law requires renunciation of the prior nationality at the time of the oath; home-country law then determines whether that renunciation is effective.
- Ibero-American nationals and citizens of Portugal, Andorra, the Philippines, Equatorial Guinea, and France are exempt from the renunciation requirement and may hold both nationalities simultaneously.
- All births in Spain must be registered at the Registro Civil within 72 hours, a step with long-term legal consequences that should not be overlooked.
Do all children born in Spain have dual citizenship with foreign parents?
Spain receives tens of thousands of international arrivals each year, many of whom form families and raise children here.
For parents who are not Spanish nationals, one of the most common legal questions is deceptively simple: what nationality does my child have?
The answer depends on a combination of Spanish law, the parents’ home-country laws, the child’s place of birth, and the residency status of the family.
This article sets out the legal framework that governs the nationality of children born in Spain to foreign parents, the routes through which those children can acquire Spanish nationality, and what the rules on dual nationality mean in practice, particularly for families from the United Kingdom, the United States, and other non-Ibero-American countries.
Questions about residency, NIE, TIE, or family reunification in Spain? Our immigration law team in Valencia advises international families in English, French, Russian, German, and Spanish.
The foundational principle: jus sanguinis, not jus soli
Spanish nationality law is codified primarily in Articles 17 to 26 of the Civil Code, which has been in force in its modern form since the constitutional reforms of 1982.
The foundational rule is jus sanguinis, the right of blood.
A child born to at least one Spanish parent is Spanish by origin, regardless of where the birth takes place.
Spain does not follow jus soli, the principle used in the United States, Canada, and most Latin American countries, under which any child born on national territory automatically acquires that country’s nationality.
This means that a British couple, a Dutch couple, or a Nigerian couple giving birth in a hospital in Valencia will not produce a Spanish child simply because the delivery took place on Spanish soil.
The child will hold the nationality or nationalities transmitted to it under the laws of the parents’ home countries.
Understanding this distinction is the starting point for every family affected by these rules.
Why this matters for international families in Valencia
The Valencian Community is one of the most internationally diverse regions in Spain.
UK nationals, Dutch, Scandinavian, Eastern European, and North American families all make their homes here, and many have children born in Spain to foreign parents who grow up entirely in this country, attending Spanish schools, speaking Spanish as their primary language, and building a life rooted here.
For those children, the question of nationality is not academic.
It affects the right to work in the EU, access to public services, freedom of movement, inheritance rights, tax obligations, and military service requirements in certain countries.
Understanding the law clearly, rather than relying on assumptions, is essential.
When Spanish nationality is granted automatically at birth
Article 17 of the Civil Code provides the complete list of cases in which a child acquires Spanish nationality by origin.
The table below summarises all four routes.
| Legal basis | Condition | Practical example |
|---|---|---|
| Art. 17.1(a) | At least one parent is Spanish at the time of birth | Spanish mother and British father: child is Spanish by origin |
| Art. 17.1(b) | A child born in Spain, and at least one parent was also born in Spain | Two Colombian parents, one of whom was born in Spain: the child acquires Spanish nationality by origin |
| Art. 17.1(c) | Child born in Spain; neither parent’s national law grants the child their nationality (statelessness prevention) | Parents from certain countries whose laws do not recognise children born abroad as nationals |
| Art. 17.1(d) | Child born in Spain of unknown parentage | Foundlings or children with no established legal parentage |
For the vast majority of children born in Spain to foreign parents, British, German, Dutch, North American, Russian, Scandinavian, none of these automatic routes will apply at birth.
The child will hold the parents’ nationality or nationalities, and any path to Spanish nationality will require a formal application.
The statelessness prevention rule explained
Article 17.1(c) deserves closer attention because it is frequently misunderstood.
The rule applies when the legislation of neither parent’s country of nationality grants the child their nationality automatically at birth.
This is not the same as saying the child will be stateless in practice; it means that Spanish law steps in to prevent a situation where the child would have no nationality at all.
It has produced significant case law involving children of nationals from certain Latin American and African countries whose legal systems condition nationality transmission on the child being born within national territory.
For British, American, German, Dutch, and most European nationals, this rule does not apply: those countries transmit nationality to children born abroad to their nationals without restriction.
A child born in Valencia to two British parents will be British from birth, and the Spanish statelessness rule has no role to play.
The one-year residency route: Article 22.2(a)
For children born in Spain to foreign parents who do not qualify for automatic nationality at birth, Spanish law provides an unusually generous route: nationality by residence after just one year of legal stay in Spain.
This is codified in Article 22.2(a) of the Civil Code, which reduces the standard ten-year residency requirement to a single year for persons born on Spanish territory.
This is one of the shortest naturalisation periods available under Spanish law and represents a significant practical advantage for children raised in the country.
How the one-year clock works
The one year does not begin at the moment of birth.
It begins on the date the child is granted legal residence in Spain.
Legal residence is not automatic; it must be applied for, and the child’s residency status generally depends on the parents’ legal status in Spain.
If at least one parent holds a valid residence permit (TIE), the child can be registered as a dependent and begin accumulating residence time from that registration date.
If neither parent has a regularised status, the child cannot obtain legal residence until the parents’ situation is resolved.
There are several pathways to legal residency in Spain for non-EU nationals, and securing the correct permit at the earliest stage has a direct impact on when the nationality clock can begin.
The procedural sequence is:
- Register the child’s birth at the Registro Civil within 72 hours of delivery.
- Obtain legal residence for the child as a dependent of a parent with a valid residence permit.
- Complete empadronamiento (municipal registration) for the child at the local town hall.
- Wait for one year of continuous, legal residence.
- File the nationality application with the Ministry of Justice via the Sede Electrónica.
- Await resolution (typically 8 to 18 months in 2026, depending on the complexity of the file and the method of submission).
- Complete the oath of allegiance (jura de nacionalidad) within 180 days of approval.
Who can file the application?
A child’s legal representative, typically the parents, can file on behalf of minors.
Children aged 14 and over may file independently with parental consent.
An adult who was born in Spain to foreign parents and has never applied for Spanish nationality can still use this route, but will be subject to the standard integration requirements: passing the DELE A2 Spanish language examination and the CCSE constitutional and sociocultural knowledge examination set by the Instituto Cervantes.
Documents required
- Spanish birth certificate (from the Registro Civil).
- Parents’ passports (original and apostilled copies).
- Parents’ NIE or TIE documents.
- Proof of the child’s legal residence (tarjeta de residencia).
- Empadronamiento certificate (municipal registration).
- Criminal record certificates from Spain and the parents’ country of origin, apostilled and sworn-translated.
- All foreign documents must carry an apostille and be accompanied by a sworn Spanish translation by a certified traductor jurado.
Foreign documents submitted in Spain require both an apostille and a certified sworn translation. The legalisation requirements for UK and foreign documents are explained in detail in our dedicated guide.
Processing timeline: what to expect in 2026
| Stage | Typical timeframe | Notes |
|---|---|---|
| Birth registration (Registro Civil) | Within 72 hours of birth | Hospital often initiates; parents must verify |
| Child’s TIE (residence card) application | 2 to 3 months after birth | Requires at least one parent with valid residence |
| One-year legal residence period | 12 months from the TIE grant date | Continuous legal residence required |
| Nationality application (Ministry of Justice) | 8 to 18 months processing | Digital submissions via lawyer typically faster |
| Oath of allegiance (jura de nacionalidad) | Within 180 days of approval | Appointment wait can be 2 to 5 months; book early |
What happens at age 18: the dual nationality question
This is the area of Spanish nationality law that causes the most confusion for children born in Spain to foreign parents who have grown up here and naturalised as Spanish nationals.
The short answer is that Spain does not recognise dual nationality with most countries, but the practical consequences depend significantly on the nationality laws of the child’s other home country.
Spain’s dual nationality framework
Article 11.3 of the Spanish Constitution authorises bilateral dual nationality treaties with Ibero-American countries and a small group of historically connected states.
Spain currently maintains formal dual nationality agreements with the following countries:
| Region or group | Countries | Renunciation required? |
|---|---|---|
| Latin America (Ibero-American treaty states) | Argentina, Bolivia, Chile, Colombia, Costa Rica, Cuba, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Paraguay, Peru, Dominican Republic, Uruguay, Venezuela | No |
| Other treaty states | Andorra, Equatorial Guinea, Philippines, Portugal, France (bilateral treaty in force since 1 April 2022) | No |
| All other countries (including the UK, USA, Germany, the Netherlands, Russia, and Ukraine) | Not covered by the treaty | Yes: renunciation required at time of oath under Spanish law |
What renunciation means in practice
When a child takes the oath of allegiance to become a Spanish national by residence, Spanish law requires them to formally declare that they renounce their previous nationality.
However, whether that declaration actually extinguishes their prior nationality depends entirely on the laws of the other country.
Under UK law, British citizenship is a constitutional right that can only be lost through a voluntary and intentional act of relinquishment before a UK consular officer.
Signing a renunciation paper at the Spanish Registro Civil does not satisfy that threshold.
The result is that many children born in Spain to foreign parents who naturalise as Spanish nationals continue to hold their British, American, or German passports in practice, because their home country does not recognise the renunciation as effective.
Spain, for its part, treats those individuals as Spanish citizens and will not recognise the other nationality on its territory.
This creates a position of de facto dual nationality, legally ambiguous but widely experienced by international families across the country.
Children who are Spanish by origin
Children who acquire Spanish nationality by origin under Article 17, for instance, because one parent was Spanish, occupy a different and more protected legal position.
Nationality of origin is protected by Article 11 of the Constitution: it cannot be forcibly removed.
A child who is Spanish by origin and also holds another nationality by descent does not face an obligation to choose at age 18.
However, if that child was born outside Spain to a Spanish parent who was also born outside Spain, they are required under Article 25 of the Civil Code to declare their intention to retain Spanish nationality within three years of turning 18 (before their 21st birthday), provided they hold the nationality of another country.
Children who hold Spanish nationality by origin and were born in Spain, or whose Spanish parent was born in Spain, face no such declaration requirement.
The registration requirement at birth: why it matters
All births in Spain, whether to Spanish or foreign parents, must be registered at the Registro Civil of the municipality where the birth occurred.
This must be done within 72 hours of delivery.
The hospital will often initiate this process, but parents should not assume it has been completed without verification.
The birth registration is the foundational legal document for everything that follows: the child’s TIE application, any subsequent nationality application, inheritance rights, and access to public services.
Foreign parents should also register the birth with the consulate of their home country to ensure the child is recognised as a national of that state from birth.
For British parents, registration with the British consulate or embassy and the application for a UK passport are separate steps from the Spanish Registro Civil registration and should be completed promptly.
A full walkthrough of this process, including the documents required and common errors to avoid, is available in our article on registering a child’s birth in Spain as a foreigner.
For British families in Spain, post-Brexit residency rules affect the entire family unit, including children. The obligations facing British expats after Brexit cover TIE applications, residency documentation, and what changed after 31 December 2020.
Three family profiles in Valencia: a scenario comparison
The table below illustrates how the legal framework applies to three common family profiles among children born in Spain to foreign parents in the Valencian Community.
| Family profile | Nationality at birth | Earliest route to Spanish nationality | Dual nationality possible? |
|---|---|---|---|
| British mother and British father, both residing legally in Valencia | British | Art. 22.2(a): after 1 year of legal residence | De facto yes (UK does not remove citizenship on Spanish renunciation); formally no under Spanish law |
| Spanish mother and British father | Spanish by origin (Art. 17.1(a)) and British by descent | Already Spanish at birth: no application required | De facto yes: Spanish nationality of origin is protected; UK does not strip citizenship |
| Colombian mother and Colombian father, legally resident in Valencia | Colombian | Art. 22.2(a): after 1 year of legal residence | Yes: Colombia is a treaty country; renunciation not required; formal dual nationality recognised |
Residency status and school enrolment: a practical note
Children born in Spain to foreign parents who are enrolled in the Spanish school system will typically accumulate their year of legal residence during their early primary years, provided the family’s residency documents are in order.
The Spanish school system for expat children operates based on empadronamiento (municipal registration), which is also a required document for the nationality application.
Families should ensure that school enrolment, empadronamiento, and the child’s TIE are all aligned and up to date, as gaps in any one of these records can complicate the nationality application later.
Permit renewals are equally important: a lapse in the child’s residence card breaks the continuity of legal residence and can reset the one-year clock.
The rules governing permit renewal, including the new 183-day presence requirement introduced by Royal Decree 1155/2024, apply to the child’s permit as well as the parents’.
Preserving Spanish nationality after acquisition
Once a child acquires Spanish nationality by residence, they must take steps to preserve it under the conditions set out in Article 24 of the Civil Code.
Spanish nationality acquired by naturalisation (rather than by origin) can be lost if the holder subsequently acquires the nationality of a non-exempt country voluntarily and then fails to declare their intention to retain Spanish nationality within three years.
For children born in Spain to foreign parents who naturalise as Spanish nationals and later move abroad as adults, this is a practical issue worth planning for.
The declaration of retention must be made before a Spanish consulate or the Registro Civil.
Missing the three-year window does not automatically extinguish nationality, but it creates a legal vulnerability that can be difficult to resolve retrospectively.
Spaniards by origin, including children born Spanish under Article 17, are not subject to this loss mechanism.
Contact our legal team
If you have questions about your child’s nationality, residency documents, or the naturalisation process in Spain, our immigration lawyers in Valencia can provide personalised guidance on your case.
Email: felix.delaguia@delaguialuzon.com
Telephone: +34 963 74 16 57
FAQs
Does my child automatically become Spanish if born in a Spanish hospital?
No.
Spain does not grant automatic birthright citizenship based solely on place of birth.
Children born in Spain to foreign parents will hold the nationality or nationalities transmitted to them under the laws of the parents’ home countries, unless one of the specific Article 17 exceptions applies.
My child was born in Valencia and has lived here for two years. Can I apply for Spanish nationality now?
Yes, provided the child has held legal residence in Spain throughout that period.
The one-year residency requirement under Article 22.2(a) is one of the shortest naturalisation periods in Spanish law and is available specifically to children born on Spanish territory.
The clock runs from the date legal residence was granted, not from the date of birth.
We are British. If our child becomes Spanish, do they have to give up their British passport?
At the time of taking the oath of allegiance, your child is required under Spanish law to declare that they renounce their prior nationality.
However, under UK law, British citizenship can only be voluntarily relinquished through a formal process before a UK consular officer.
A declaration made at the Spanish Registro Civil does not meet that threshold.
In practice, many British children born in Spain to foreign parents who naturalise as Spanish nationals retain their British passport, making them de facto dual nationals.
Spain will not recognise the British nationality on Spanish territory, but the UK will continue to treat the individual as a British citizen.
One of our child’s grandparents was Spanish. Does that help?
Spanish nationality does not transmit automatically through grandparents under the standard rules of the Civil Code.
However, if your parent (the child’s grandparent) was originally Spanish, was born in Spain, and subsequently lost or renounced Spanish nationality, there may be a route under Article 20 of the Civil Code or, depending on the circumstances, under Ley 20/2022 de Memoria Democrática.
These routes are complex and fact-specific; a consultation with a Spanish nationality lawyer is advisable before proceeding.
We are a Colombian family. Will our child born in Valencia be able to hold both Colombian and Spanish nationality?
Yes.
Colombia is one of the Ibero-American countries with which Spain has a bilateral dual nationality agreement.
Colombian nationals who acquire Spanish nationality are not required to renounce their Colombian citizenship.
Once your child has accumulated one year of legal residence and completes the naturalisation process, they will formally hold both nationalities.
Can we start the nationality process before the child turns one?
No.
The application cannot be filed until the one-year legal residence requirement has been met.
However, parents should ensure the child’s legal residence is registered as early as possible after birth, so the one-year period begins running at the earliest opportunity.
What happens if we do not register the birth at the Registro Civil within 72 hours?
The birth can still be registered at the Registro Civil office, though the process becomes more administratively complex after the 72-hour window has passed.
In exceptional circumstances, the deadline may be extended to ten days.
Late registration does not extinguish the child’s rights, but it can delay subsequent residency and nationality applications and should be avoided where possible.
Does Spain allow triple nationality?
Spanish law does not make specific provision for triple nationality.
The bilateral dual nationality treaties create formal entitlement to hold two nationalities simultaneously.
Beyond that, the same de facto logic applies: if the third country does not strip its citizens of nationality upon acquiring Spanish citizenship, the individual will hold three passports in practice, even though Spanish law does not formally recognise more than one nationality for persons not covered by a treaty.
