Angolan nationality law is regulated by the Constitution of Angola, as amended; the Nationality Act, and its revisions; and various international agreements to which the country is a signatory. These laws determine who is, or is eligible to be, a national of Angola. The legal means to acquire nationality, formal legal membership in a nation, differ from the domestic relationship of rights and obligations between a national and the nation, known as citizenship. Angolan nationality is typically obtained under the principle of jus sanguinis, i.e. by birth in Angola or abroad to parents with Angolan nationality. It can be granted to persons with an affiliation to the country, or to a permanent resident who has lived in the country for a given period of time through naturalization.

Obtaining Angolan nationality Nationality can be obtained in Angola through birth or naturalization. Angolan law makes a distinction between attribution and acquisition of nationality. Attribution is automatic and from birth; whereas, acquisition is obtained later and effective into the future.

By birth Births must be registered in the Civil Registry Office and proof of the parents' nationality must be provided. Proof may be presentation of the parents' birth registration or an identity card. In the case of a birth abroad, a declaration made before consular officials, may also be required.

Persons born anywhere to at least one parent who has Angolan nationality; Newborn foundlings, under one year of age, with no discernible evidence as to the nationality or identity of its parents; or Persons who later in life discovered that at birth they had a parent of Angolan nationality.

By naturalization Angolan nationality may be acquired through application for persons who have reached eighteen, the age of majority, and have legal capacity, to the Ministry responsible for immigration. They must provide documentation to confirm identity, economic status, and lack of a serious criminal record, as well as evidence of satisfactory examinations by the Citizenship Commission. Applicants must demonstrate that they are of good character, can integrate with Angolan society, are self-sufficient and able to sustain themselves, and have no criminal record with penalties exceeding three year sentencing. In addition, applicants must take examinations to confirm their understanding of Angolan civics, adequate ability in Portuguese, and knowledge of the cultural and societal norms of the territory. Ten years of residency is calculated from the date of issuance of a permit for permanent residency. Upon approval, applicants must take an Oath of Allegiance. Besides foreigners meeting the criteria, other persons who may apply for naturalization include:

Spouses of, or persons in Registered Partnerships with Angolan nationals, as long as the union is legally valid and on-going, the foreign partner consents, and the union occurred at least five years prior to the request; Minor adoptees, for those over age fourteen with the child's consent, upon request and certification of an adoption order; Children under the age of fourteen who have been abandoned or orphaned; Minor children, or incapacitated persons, of naturalized Angolan parents; Stateless persons who have no other nationality, upon request without meeting general criteria; or Persons who have rendered exceptional artistic, athletic, entrepreneurial, or scientific service to the nation, at the discretion of the National Assembly or President.

Loss of nationality Angolans who were attributed nationality at birth cannot be deprived of it. They are allowed to renounce their nationality, provided the renunciation is officially recorded in the Central Registry Office. Persons can be denaturalized in Angola by committing a crime against state security; by serving another nation in an official capacity without having informed the Angolan National Assembly beforehand; by serving in a foreign military; by having obtained nationality through fraud, false representation, or concealment; or for having acquired Angolan nationality but using other nationality to obtain benefits restricted to specific classes of persons.

Dual nationality Angola has allowed dual nationality since 1991. The Nationality Law of 1984 discouraged dual nationality, but recognized that based on international agreements such status might exist either voluntarily or involuntarily. Since 1991, the Nationality Law has not banned dual nationality, but recognized that other nationality possessed of Angolans must not have legal applicability while in Angola.

History Kingdom of Kongo (1350–1575) The territory which is Angola was traditionally part of the lands conquered and consolidated by agreement of the rulers of Mpemba Kasi in the period between 1350 and 1375. Around 1390, the capital of the Kingdom of Kongo was established at M'banza-Kongo by Lukeni lua Nimi, the first king. The kingdom was expanded by alliance and conquest through the sixteenth century. Though the provinces and sub-provinces typically retained their independence, they paid tribute and owed allegiance to the king. The ruling hierarchy dominated village economies where communal lands were farmed and goods were distributed between the laboring households. Rents and surplus produce was paid to the local ruling class, whose authority was likely based upon kinship networks. Larger towns were supported by plantation production which was worked by slaves, who belonged to the local nobility. Representatives of the ruling class typically divided their living spaces between the town and countryside to ensure that taxes, which facilitated acquisition trade goods, were paid. The king's authority was established through his control of the estates that supported the capital and his strategic use of lineage and patronage. To ensure the support of the nobility, the king dispatched nobles to rural areas for short periods of time and as an incentive for success moved them to more important districts and eventually to the capital.

Between 1482 and 1484, Portuguese explorer Diogo Cão explored the Zaire River estuary and encountered the inhabitants of the kingdom. A second exploration by Cão took place between 1485 and 1486, wherein he made his way to the capital, M'banza-Kongo. In 1491, a fleet including priests, soldiers and builders, arrived and after making their way to the capital, baptized king Nzinga a Nkuwu, who took the name João, and five of his leading chieftains. João's son Nzinga Mbemba, who took the name Afonso I, was also baptized that year. Afonso became a committed Christian and used Christianity to expand and consolidate his reign when he succeeded his father in 1506. In 1509, Afonso used Portuguese troops to assist in subduing the territories to the north of Nsundi, which included Nsanga and Masinga, two copper producing towns which were aligned with the Tio Kingdom. Throughout his reign Afonso was involved in the slave trade with the Portuguese, who needed the labor for their Brazilian plantations.

Upon Afonso's death, the kingdom weakened and saw a succession of short-lived monarchs reign between 1545 and 1568. Calling on his Portuguese allies for support, when M'banza-Kongo was sacked by the Yaka people in 1569, Álvaro I sought refuge on an island in the Congo River. Sebastião I of Portugal sent 600 men under the command of Francisco Gouveia Sottomaior, the governor of São Tomé, who were able to restore Álvaro to the throne in 1574. In exchange for his support, Sebastião had Álvaro sign official papers of vassalage and agree to assist the Portuguese in establishing a colony in the Kingdom of Ndongo in an area south of the Cuanza River. Sebastião had already given Paulo Dias de Novais a royal charter to colonize and establish the Kingdom of Angola, over which he would become the Captain-Governor and hereditary overlord.

Portuguese period (1575–1975) Dias established the Colony of Angola by occupying Luanda Island in 1575. He founded the capital of Luanda the following year with a hundred families and four hundred soldiers. Until the 1920s, Portugal held Luanda and Benguela, which it founded in 1587, but was unable to extend its control to the interior of the country because of resistance to colonization, internal warfare, and tropical disease which killed potential settlers. Under the Ordinances of Manuel I (), compiled by Portugal in 1521, courts were given leeway to interpret common law and local custom in the territories without established High Courts. Nationals were defined as those born in Portuguese territory and leaving the territory without permission of the sovereign was grounds for denaturalization. In 1603, the () established that Portuguese nationals were children born on the Iberian Peninsula or adjacent islands, Brazil, or to an official in service to the crown in the Portuguese possessions of Africa or Asia, whose father was a native of Portugal, or whose mother was a native of Portugal and whose father was a foreigner who had established domicile in Portugal for a minimum of ten years. Those who were not in service to the crown in the colonies (except Brazil) were not considered to be Portuguese. A child could not derive nationality directly from its mother unless it was illegitimate.

The first Constitution of Portugal, drafted in 1822, defined subjects of the Portuguese crown as the children of a male, native to any of the territories of the kingdom. The nationality scheme laid out in 1603 remained mostly unchanged except for some clarifications, such as legitimate children of a Portuguese father or illegitimate children of a Portuguese mother born abroad could be nationals if they resided in Portugal and children born to a Portuguese mother and foreign father could only derive Portuguese nationality upon reaching their majority and requesting it. Two new provisions included that foundlings discovered on Portuguese soil were considered nationals, as were freedmen. Naturalization was only available to foreign men who married Portuguese women, and only if they had investments in the country or provided service to the crown. Denaturalization resulted from service to, or receiving benefits from, a foreign government, or obtaining other nationality. A new constitution was adopted in 1826 (which was in force from 1826 to 1828, 1834 to 1836, and 1842 to 1910) which granted nationality to anyone born on Portuguese soil. Birth by descent was accepted as establishing nationality, as long as the father lived in Portugal or was abroad in service to the monarch. Provisions stipulated that only illegitimate children could derive nationality from their mother and established that a nationality law was to define provisions for naturalization.