General Discussion

Unrestricted jus soli

Antigua and Barbuda: Guaranteed by the Constitution.[6][11] However, one government official told the Center for Immigration Studies that the country's current effort to tighten immigration policies may include an end to automatic birthright citizenship for children of illegal immigrants.[12]
Argentina Argentina[6]
Barbados Barbados: Guaranteed by the Constitution.[6][13] However, the Barbados Ministry of Labour & Immigration recently proposed ending automatic birthright citizenship.[14]
Belize[6]
Bolivia[6]
Brazil Brazil[6]
Canada Canada[6][15]
Costa Rica[6][16] (requires registration with the Costa Rican government before the age of twenty-five)
Dominica[6]
Ecuador[6]
El Salvador[6]
Fiji[17]
Grenada[6]
Guatemala[6]
Guyana[6]
Honduras[6]
Jamaica[6][18]
Lesotho[19]
Mexico Mexico[6][20]
Nicaragua[6]
Pakistan Pakistan[6][21]
Panama[6]
Paraguay Paraguay[6]
Peru Peru[6]
Saint Kitts and Nevis[6]
Saint Lucia[6]
Saint Vincent and the Grenadines[6]
Tanzania Tanzania
Trinidad and Tobago [6][22]
Tuvalu[23]
United States[26]
Uruguay Uruguay[6]
Venezuela[6][27]

Australia:[28] Since 20 August 1986, a person born in Australia acquires Australian citizenship by birth only if at least one parent was an Australian citizen or permanent resident or upon the 10th birthday of the child regardless of their parent's citizenship status (see Australian nationality law).
Bahrain: Children born to a foreign father with valid residency permits who himself was born in Bahrain have right to citizenship.[30]
Cambodia: In 1996, Cambodia changed the law to only grant citizenship to children born to foreign parents living legally in the Kingdom of Cambodia (under Article 4(2)(a) of the 1996 Nationality Law).[31]
Chile: The 1980 Constitution changed the Chilean nationality law to require that children born in Chile of non-citizen parents must request citizenship and that this request be approved by the government.[32]
Colombia: a person born in Colombia with at least one parent being a Colombian citizen or resident is automatically a Colombian citizen (see Colombian nationality law).
Dominican Republic: The constitution was amended on 26 January 2010. The amendment broadened the definition of the 2004 migration law – which excluded from citizenship children born to individuals that were "in transit" - to include "non-residents" (including individuals with expired residency visas and undocumented workers).[33][34][35][36][37][38]
Egypt: According to Article 4 of nationality law of the Arab Republic of Egypt, persons born in Egypt gain citizenship at birth if the father also was born in Egypt.[39]
France: Children born in France (including overseas territories) to at least one foreign parent who is also born in France automatically acquire French citizenship at birth. Children born to foreign parents may request citizenship depending on their age and length of residence (see French nationality law).
Germany: An exception to the increasing restrictiveness toward birthright citizenship, Germany, prior to 2000, had its nationality law based entirely on jus sanguinis. Now, children born on or after 1 January 2000 to non-German parents acquire German citizenship at birth if at least one parent has a permanent residence permit (and had this status for at least three years) and the parent was residing in Germany for at least eight years.
Hong Kong Hong Kong: Since the July 1997 transfer of sovereignty over Hong Kong, most political rights and eligibility for most benefits are conferred to permanent residents regardless of citizenship; conversely, PRC citizens who are not permanent residents (such as residents of Mainland China and Macao) are not conferred these rights and privileges. The Basic Law provides that all citizens of the People's Republic of China (PRC) born in the territory are permanent residents of the territory and have the right of abode in Hong Kong. The 2001 case Director of Immigration v. Chong Fung Yuen clarified that the parents need not have right of abode,[40] and as a consequence, many women from Mainland China began coming to Hong Kong to give birth; by 2008, the number of babies in the territory born to Mainland China mothers had grown to twenty-five times the number five years prior.[41][42] Non-PRC citizens born to non-PRC citizen permanent resident parents in Hong Kong also receive permanent residence at birth. Other persons must have "ordinarily resided" in Hong Kong for seven continuous years in order to gain permanent residence (Articles 24(2) and 24(5)).[43]
Iran: Article 976(4) of the Civil Code of Iran grants citizenship at birth to persons born in Iran of foreign parents if one or both of the parents were themselves born in Iran. See Iranian nationality law.[44]
Ireland: On 1 January 2005, the law was amended to require that at least one of the parents be an Irish citizen; a British citizen; a child of a resident with a permanent right to reside in Ireland; or be a child of a legal resident residing three of the last four years in the country (excluding students and asylum seekers) (see Irish nationality law).[28]
Malaysia: a person born in Malaysia on or after 16 September 1963 with at least one parent being a Malaysian citizen or permanent resident is automatically a Malaysian citizen (see Malaysian nationality law).
Morocco: A person who was born in Morocco to parents also born in Morocco lands and whose immigration is legal, can register as a Moroccan two years prior to becoming adult.[45]
Namibia: A person born in Namibia to a Namibian citizen parent or a foreign parent who is ordinarily resident in Namibia, is a Namibian citizen at birth. (see Namibian nationality law).
New Zealand:[28] Since 1 January 2006 a person born in New Zealand acquires New Zealand citizenship by birth only if at least one parent was a New Zealand citizen or permanent resident (see New Zealand nationality law).[46]
Portugal: A child born in Portuguese territory to who does not possess another nationality is a Portuguese citizen. Also, a person born to foreign parents who were not serving their respective States at the time of birth is a Portuguese citizen if the person declares that they want to be Portuguese and provided that one of the parents has legally resided in Portugal for at least five years at the time of birth.[47]
South Africa:[28] Since 6 October 1995 a person born in South Africa to South African citizens or permanent residents are automatically granted South African citizenship (see South African nationality law).
Sudan: A person born before 1994 gains Sudanese nationality at birth if his father was also born in Sudan. If his father was not born in Sudan, he can apply to the Minster to be granted Sudanese nationality.[48][49]
Thailand: Thailand operated a system of pure jus soli prior to 1972, but afterwards, due to illegal immigration from Burma, the Nationality Act was amended to require that both parents be legally resident and domiciled in Thailand for at least five years in order for their child to be granted Thai citizenship at birth.[50][51] Furthermore, someone who has Thai citizenship by sole virtue of jus soli may be stripped of Thai citizenship under various conditions (such as living abroad) which do not apply to people who have Thai citizenship by virtue of jus sanguinis.[52]
Tunisia: Individuals born in Tunisia are citizens by birth if their father and grandfather were born in Tunisia. Additionally, the person must declare before becoming an adult (20 years) that he wants to be a citizen.[53]
United Kingdom: Since 1 January 1983, at least one parent must be a British citizen or be legally "settled" in the country (see British nationality law).