All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the state wherein they reside. No state shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any state deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws. - XIV Amendment to the U.S. Constitution

Citizenship is one of the most coveted gifts that the U.S. government can bestow, and the most important immigration benefit that USCIS can grant. Most people become U.S. citizens in one of two ways:

• By birth, either within the territory of the United States or to U.S. citizen parents, or
• By Naturalization

In addition, in 2000, Congress passed the Child Citizenship Act (CCA), which allows any child under the age of 18 who is adopted by a U.S. citizen and immigrates to the United States to acquire immediate citizenship.

Naturalization is the process by which U.S. citizenship is conferred upon a foreign citizen or national after he or she fulfills the requirements established by Congress in the Immigration and Nationality Act (INA). The general requirements for administrative naturalization include:

• a period of continuous residence and physical presence in the United States;
• residence in a particular USCIS District prior to filing;
• an ability to read, write, and speak English;
• a knowledge and understanding of U.S. history and government;
• good moral character;
• attachment to the principles of the U.S. Constitution; and,
• favorable disposition toward the United States.

Applicants must be at least 18 years old.
Refer to the section, Naturalized Citizen's Children under Waivers, Exceptions, and Special Cases for information on applicants who are less than 18 years old.

An applicant must have been lawfully admitted to the United States for permanent residence. Lawfully admitted for permanent residence means having been legally accorded the privilege of residing permanently in the United States as an immigrant in accordance with the immigration laws. Individuals who have been lawfully admitted as permanent residents will be asked to produce an I-551, Alien Registration Receipt Card, as proof of their status.

An applicant is eligible to file if, immediately preceding the filing of the application, he or she:

• has been lawfully admitted for permanent residence (see preceding section);
• has resided continuously as a lawful permanent resident in the U.S. for at least 5 years prior to filing with no single absence from the United States of more than one year;
• has been physically present in the United States for at least 30 months out of the previous five years (absences of more than six months but less than one year shall disrupt the applicant's continuity of residence unless the applicant can establish that he or she did not abandon his or her residence during such period) has resided within a state or district for at least three months.

Generally, an applicant must show that he or she has been a person of good moral character for the statutory period (typically five years or three years if married to a U.S. citizen or one year for Armed Forces expedite) prior to filing for naturalization. The Service is not limited to the statutory period in determining whether an applicant has established good moral character. An applicant is permanently barred from naturalization if he or she has ever been convicted of murder. An applicant is also permanently barred from naturalization if he or she has been convicted of an aggravated felony as defined in section 101(a)(43) of the Act on or after November 29, 1990. A person also cannot be found to be a person of good moral character if during the last five years he or she:

• has committed and been convicted of one or more crimes involving moral turpitude
• has committed and been convicted of 2 or more offenses for which the total sentence imposed was 5 years or more
• has committed and been convicted of any controlled substance law, except for a single offense of simple possession of 30 grams or less of marijuana
• has been confined to a penal institution during the statutory period, as a result of a conviction, for an aggregate period of 180 days or more
• has committed and been convicted of two or more gambling offenses
• is or has earned his or her principal income from illegal gambling
• is or has been involved in prostitution or commercialized vice
• is or has been involved in smuggling illegal aliens into the United States
• is or has been a habitual drunkard
• is practicing or has practiced polygamy
• has willfully failed or refused to support dependents
• has given false testimony, under oath, in order to receive a benefit under the Immigration and Nationality Act

An applicant must disclose all relevant facts to the Service, including his or her entire criminal history, regardless of whether the criminal history disqualifies the applicant under the enumerated provisions.

An applicant must show that he or she is attached to the principles of the Constitution of the United States.

Applicants for naturalization must be able to read, write, speak, and understand words in ordinary usage in the English language. Applicants exempt from this requirement are those who on the date of filing:

• have been residing in the United States subsequent to a lawful admission for permanent residence for periods totaling 15 years or more and are over 55 years of age;
• have been residing in the United States subsequent to a lawful admission for permanent residence for periods totaling 20 years or more and are over 50 years of age; or
• have a medically determinable physical or mental impairment, where the impairment affects the applicant’s ability to learn English.

An applicant for naturalization must demonstrate a knowledge and understanding of the fundamentals of the history and of the principles and form of government of the United States. Applicants exempt from this requirement are those who, on the date of filing, have a medically determinable physical or mental impairment, where the impairment affects the applicant’s ability to learn US History and Government Applicants who have been residing in the US subsequent to a lawful admission for permanent residence for at least 20 years and are over the age of 65 will be afforded special consideration in satisfying this requirement.

To become a citizen, one must take the oath of allegiance. By doing so, an applicant swears to:

• support the Constitution and obey the laws of the U.S.;
• renounce any foreign allegiance and/or foreign title; and
• bear arms for the Armed Forces of the U.S. or perform services for the government of the U.S. when required.

In certain instances, where the applicant establishes that he or she is opposed to any type of service in armed forces based on religious teaching or belief, INS will permit these applicants to take a modified oath.