Cómo obtener la ciudadanía de Estados Unidos

Person has been the spouse of a citizen and resident in the United States for 3 years with common household. (Residence requirement can be waived under certain circumstances.) Other conditions: see the rules for ordinary naturalisation.

Person is born abroad to two citizens one of whom had residence in the United States or its outlying possessions prior to the person's birth.

Person is born abroad to a citizen who has been physically present in the United States or its outlying possessions for a continuous period of 1 year prior to the person's birth, and the other parent is a national, but not a citizen.

Person is born abroad to an alien and a citizen and the latter was, prior to the person's birth, physically present in the United States or its outlying possessions for a total period of at least 5 years, at least 2 of which were after attaining the age of 14. (Residence abroad in a certain capacity may be counted to satisfy the physical-presence requirement.).

Person is the minor child of a citizen who has parental authority and the child legally and permanently resides in the United States.

Person is the minor child of a citizen AND (1) the parent has been physically present in the United States or its outlying possessions for a total period of at least 5 years, at least 2 of which were after attaining the age of 14, OR (2) that parent him/herself had a parent who has been physically present in the United States or its outlying possessions for a total period of at least 5 years, at least 2 of which were after attaining the age of 14, AND the child is resident abroad but is temporarily and lawfully present in the United States.

Person is born in the United States, Puerto Rico, the US Virgin Islands or Guam.

Person is born in an outlying possession of the United States to a parent who is a citizen and who has been physically present in the United States or one of its outlying possessions for a continuous period of 1 year at any time prior to the person's birth.

Person born in 'outlying possessions' (defined to include American Samoa only) are nationals but not citizens at birth.

Person is the minor child of a citizen who has parental authority and the child legally and permanently resides in the United States.

Person is over the age of 50 or 55 and has been living in the United States for a total period of at least 20 or 15 years, respectively, subsequent to a lawful admission for permanent residence. Other conditions: see the rules for ordinary naturalisation (except language requirement). Persons over 65 years of age and living in the United States for periods totalling at least 20 years are additionally given 'special consideration' for purposes of knowledge of history and principles of governance.

Person is found in the United States of unknown parentage and is younger than 5 years.

Person has served at any time in the armed forces for a total period of at least 1 year, served in the armed forces during military hostilities, or made an extraordinary contribution to the national security of the United States or to the conduct of the United States intelligence activities. Other conditions: see the rules for ordinary naturalisation (except residence requirement).