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Jus soli (English: /dʒʌs ˈsoʊlaɪ/ juss SOH-ly or /juːs ˈsoʊli/ yooss SOH-lee, Latin: [juːs ˈsɔliː]), meaning 'right of soil', is the right of anyone born in the territory of a state to nationality or citizenship. Jus soli was part of the English common law, in contrast to jus sanguinis ('right of blood') associated with the French Civil Code of 1804.
Jus soli is the predominant rule in the Americas; explanations for this geographical phenomenon include the establishment of lenient laws by past European colonial powers to entice immigrants from the Old World and displace native populations in the New World, along with the emergence of successful wars of independence movements that widened the definition and granting of citizenship, as a prerequisite to the abolishment of slavery since the 19th century.
There are 35 countries that provide citizenship unconditionally to anyone born within their national borders. Some countries outside the Americas with mixed systems extend jus soli citizenship on a limited basis to children who are not otherwise eligible for any national citizenship, such as children born to women who are unwed or from countries that do not recognize maternal jus sanguinis citizenship. Others impose a residency requirement requiring parents to live in the country for a certain number of years before children born in the country become eligible for conditional jus soli citizenship. These mixed systems were implemented to fulfill treaty obligations after the atrocities of World War II increased awareness about the vulnerability of stateless persons. When the sovereignty over a territory is transferred from one state to another, individuals may be given the right of option of nationality based on jus soli or other rules.
Jus soli, sometimes called lex soli, is the principle of citizenship acquired by the place of birth. French jurist Charles Demolombe invented the term around 1860. Children born to a parent in the diplomatic or consular service of another state are often not eligible for jus soli citizenship in a host State.
Unconditional jus soli is mostly found in the Americas. Some countries outside the Americas with mixed systems extend jus soli citizenship on a limited basis to children who are not otherwise eligible for any national citizenship, such as children born to women who are unwed or from countries that do not recognize maternal jus sanguinis citizenship. Others impose a residency requirement requiring parents to live in the country for a certain number of years before children born in the country become eligible for conditional jus soli citizenship. UNHCR gives ten reasons for why people become stateless including laws related to marriage, administrative practices, renunciation of citizenship and nationality laws that discriminate on the basis of gender.
There is a trend in some countries toward restricting jus soli by requiring that at least one of the child's parents be a citizen, national or legal permanent resident of the state in question at time of the child's birth.

Countries that have acceded to the 1961 Convention on the Reduction of Statelessness are obligated to grant nationality to people born in their territory who would otherwise become stateless persons. These mixed systems were implemented to fulfill treaty obligations after the atrocities of World War II increased awareness about the vulnerability of stateless persons.
The American Convention on Human Rights similarly provides that "Every person has the right to the nationality of the state in whose territory he was born if he does not have the right to any other nationality."
The New Oxford American Dictionary defines birthright citizenship as "a legal right to citizenship for all children born in a country's territory, regardless of parentage". In the United States jus sanguinis is not a constitutional right or a birth right. Citizenship by jus sanguinis is a legal status conferred by statute. The term birthright citizenship usually means jus soli citizenship.
Birthright citizenship is rooted in colonial history when settlers born in the colonial United States were considered "natural born" subjects of the King of England. The idea of conferring citizenship based on being born within the borders of the United States comes from this history. Allegiance based on natural law principles was the core concept of citizenship in Calvin's Case in which Edward Coke said that "they that are born under the obedience, power, faith, ligealty or ligeance of the King are natural subjects and no aliens". The American concept of citizenship is derived from republican principles and may have been influenced by the French writer Emer de Vattel.
Countries have been restricting the right of jus soli in order to discourage birth tourism, anchor babies and illegal immigration, for example with the British Nationality Act 1981. India has abolished jus soli largely in reaction to illegal immigration from Bangladesh. A person who was born in India from 26 January 1950 until 1 July 1987 is a citizen by birth, regardless of the parents' nationality. It was restricted in 1987 to people with at least one parent who was a citizen. As of 2008, a person born in India is a citizen only if at least one parent is a citizen, and the other parent is a citizen or a legal migrant. New Zealand abolished unrestricted birthright citizenship in 2005. Around 9% of all births in the United States in 2023 were to mothers who were illegal immigrants or who had legal temporary status in the U.S.
a well-established exception in customary international law is that a child born to parents who are foreign diplomats does not automatically acquire the nationality of a host State that applies jus soli.
Hannah Arendt argued that in Nazi Germany and the territories occupied by the regime, making Jews stateless enabled them to be treated differently from citizens. She writes that 'the Jews had to lose their nationality before they could be exterminated'...Stateless persons are often extremely vulnerable, and may find themselves excluded from the legal labour market, from property ownership and other basic rights, making them easily subject to exploitation.
Birthright citizenship goes back to colonial America and is based on the idea of "natural born" subjects of the King of England. After separating from England, the United States continued the idea of a natural-born citizen subject of the nation rather than the king. The right to claim citizenship as a result of being born in the territory of a state is known as the principle of jus soli, which is Latin for "right to soil." This born-into-nation idea, jus soli, is the basis for the United States conferring birthright citizenship on those born inside its borders".
Every child born in Fiji on or after the date of commencement of this Constitution becomes a citizen at the date of birth unless, at the date of birth: (a) a parent of the child has the diplomatic immunity accorded to envoys of foreign sovereign powers accredited to Fiji; and (b) neither parent is a citizen.
Under subsection 1, subject to subsections (3) and (4), a person born in Tuvalu on or after the date on which this Constitution took effect is a citizen of Tuvalu by birth.Note: subsection 3 states that a person does not become a citizen of Tuvalu by virtue of subsection (1) if at the time of his birth neither of his parents was a citizen of Tuvalu; and his father had the privileges and immunities of an envoy to Tuvalu from a country with which Tuvalu had diplomatic relations. And subsection 4 states that a person does not become a citizen of Tuvalu by virtue of subsection (1) if his father was a citizen of a country with which Tuvalu was at war; and the birth occurred in a place in Tuvalu occupied by that country.
a) os nascidos na República Federativa do Brasil, ainda que de pais estrangeiros, desde que estes não estejam a serviço de seu paí