Overview

Nationality is the formal legal link between an individual and a sovereign state. It establishes which state has primary responsibility for a person under international law and often determines the passport a person holds, the state's right to offer diplomatic protection, and eligibility for certain public roles. When officials ask for your "nationality" on a travel form they typically mean the country whose passport you use.

Although terms vary by country, nationality usually confers a bundle of rights and obligations. These frequently include the right to enter and reside in the state, access to consular assistance abroad, and duties such as obeying the law and paying taxes. Many legal systems equate nationality with citizenship, but the two concepts can differ in nuance and scope. For example, some territories recognize people as nationals without granting full political rights associated with citizenship.

How nationality is acquired

States determine nationality through laws that commonly rely on two principles: descent (jus sanguinis) and territory of birth (jus soli). Under jus sanguinis, children inherit nationality from one or both parents; under jus soli, birth within a state's borders can confer nationality. Other routes include naturalization, registration, adoption, and, less commonly, restoration. Diplomatic and military service abroad, marriage, and special legislation may also affect a person's status.

Changing, dual nationality and loss

Many countries permit dual or multiple nationality, under which a person is legally attached to more than one state simultaneously. Dual nationality can arise automatically at birth or through naturalization. Conversely, some states restrict dual nationality or require formal renunciation. Nationality can be lost voluntarily by renouncing it, or involuntarily through revocation under limited circumstances; laws differ widely and often include safeguards to avoid creating statelessness.

Historical and cultural meanings

The word "nationality" has carried different meanings across time and languages. Historically it could signify membership in an ethnic community or cultural nation rather than a legal status. In modern usage the term frequently straddles legal and identity dimensions: a person may be described as "Italian" for cultural reasons even if they lack an Italian passport, as can be the case with members of the Italian diaspora. Earlier meanings of nationality often referenced an ethnic group or common ancestry rather than statehood.

Examples and notable distinctions

  • Legal nationality: a Swedish national whose legal bond is with the Kingdom of Sweden.
  • Dual nationality example: a person holding ties to the United Kingdom and the Republic of Ireland.
  • Distinction: nationality vs citizenship—related concepts but not always identical in law.
  • Practical issue: statelessness occurs when no state recognizes a person as a national.

For more general background on how states regulate nationality and how international law treats issues such as dual nationality and statelessness, consult sources on nationality law and human rights practice, or the legal provisions of individual states as needed. States are the primary actors defining nationality, and rules reflect historical, political, and social priorities specific to each jurisdiction (state).

Note: terminology and legal effects vary. For authoritative guidance on a particular case, refer to national legislation or specialized legal advice.