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U.S. Navy recruits stand together taking the Naturalization Oath of Allegiance during a ceremony at Recruit Training Command in Great Lakes, Illinois.
Civics

Path to Citizenship: How Naturalization Works

Becoming a U.S. citizen is a defined legal process with fixed eligibility rules, a multi-step USCIS application, and a civics and English test, not an informal or arbitrary decision. Here is how the process actually works today, and the 235 years of legal history that shaped it.

1790 to the presentSourced to USCIS, the National Archives, and DHS

One Clause in the Constitution, 235 Years of Rewrites

The Constitution gives Congress the power to set a "uniform Rule of Naturalization" in a single short clause, and Congress has rewritten the details of that rule more than a dozen times since 1790, from who was eligible at all to how long an applicant had to wait. Here is how today's process took shape.

Immigrants recently arrived from foreign countries gather at the Immigrant Building on Ellis Island in New York Harbor, 1904.

Immigration and naturalization are legally distinct steps. Arriving at a port like Ellis Island only began the process; naturalization itself came later, often years later, and only for those who qualified under the law of the time.

Sources & Further Reading

This page draws on the USCIS Policy Manual and official naturalization test and study materials, the USCIS History Office and Library's published agency history, National Archives naturalization records guidance, the Library of Congress's Ellis Island and immigration research materials, and the Department of Homeland Security's Office of Homeland Security Statistics annual naturalization reports. Fees, processing figures, and test requirements reflect the most recently published USCIS and DHS data as of this writing and are updated by those agencies from time to time.

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