Those who, under the Constitution and laws of the United States, or of a particular community or of a foreign country, owe allegiance and are entitled to the enjoyment of all Civil Rights that Accrue to those who qualify for that status. Neither the United States nor a state is a citizen for purposes of diversity of citizen-ship, a phrase that is used in regard to the jurisdiction of the federal courts, which—under Article III, Section 2, of the Constitution—empowers those courts to hear and decide cases between citizens of different states
. Municipalities and other local governments, however, are deemed to be citizens.
The term citizen in Article III of the Constitution, which established the federal judiciary, includes corporations; therefore, suits concerning corporations involve citizens for federal jurisdictional purposes. The term citizen, however, as defined by the Fourteenth and Fifteenth Amendments, does not encompass either corporations or Aliens. Neither corporations nor aliens receive the protection of the Privileges and Immunities Clauses of the Fourteenth Amendment and Article IV, as those clauses protect only citizens.
Aliens, however, are considered to be "persons" for the purposes of the due process Clauses of the Fifth and Fourteenth Amendments and the equal protection clause of the Fourteenth Amendment.
Citizen of a State legal definition of Citizen of a State