A non-citizen cannot serve in Congress. Under Article I of the Constitution, every member of the House must have been a U.S. citizen for at least seven years, and every Senator for at least nine, in addition to meeting age and state residency requirements.1Cornell Law Institute. Article I Green card holders, visa holders, and anyone else who has not naturalized fall short of that citizenship requirement. Naturalized citizens who have held citizenship long enough, however, are just as eligible as citizens born in the United States.
The House Requirement: Seven Years a Citizen
Article I, Section 2 sets three qualifications for the House. A Representative must be at least twenty-five years old, must have been a U.S. citizen for at least seven years, and must live in the state that elects them.1Cornell Law Institute. Article I
The seven-year clock starts on the date citizenship is conferred, not the date a green card was issued or an application was filed. Someone born abroad who naturalized at age twenty would not be eligible for the House until age twenty-seven at the earliest.
The Senate Requirement: Nine Years a Citizen
Article I, Section 3 follows the same structure but raises every threshold. A Senator must be at least thirty, must have been a citizen for at least nine years, and must live in the state they represent.2Cornell Law School / Legal Information Institute (LII). Article I Legislative Branch Section III – Clause 3 Qualifications The framers set the Senate bar higher because Senators serve six-year terms and hold unique powers over treaties and presidential appointments. For a newly naturalized citizen planning a political timeline, those two extra years matter.
When the Citizenship Threshold Must Be Met
The Constitution’s text uses the phrase “when elected” only for the state residency requirement. The age and citizenship duration conditions are written differently, and long-settled congressional practice treats them as conditions that must be satisfied by the time a member is seated, not necessarily on Election Day.3Cornell Law Institute. Qualifications of Members of the House of Representatives
That matters in close cases. A naturalized citizen who has been a citizen for six years and eight months on Election Day could still win a House race and take the seat once the seven-year mark arrives, as long as it arrives before the swearing-in. The same logic applies to the nine-year threshold in the Senate. Residency, by contrast, must exist at the moment of election.
From Non-Citizen to Eligible Candidate
Under federal immigration law, an “alien” is any person who is not a citizen or national of the United States.4Office of the Law Revision Counsel. 8 USC 1101 Definitions That covers everyone from undocumented immigrants to lawful permanent residents holding green cards. None of those statuses satisfies the constitutional citizenship requirement, and none of them starts the seven- or nine-year clock.
The path runs through naturalization. Most applicants must hold a green card for at least five years before filing Form N-400, or three years if married to a U.S. citizen. They must then pass a civics and English exam, clear a background check, and take the oath of allegiance. Processing from application to oath typically runs eight to fourteen months. Only after the oath does the congressional citizenship clock begin.
Stack those steps together and the minimum realistic timeline from receiving a green card to House eligibility runs roughly twelve to fourteen years. Senate eligibility runs closer to fourteen to sixteen years.
Naturalized Citizens Are Fully Eligible
Once naturalized, a person holds exactly the same citizenship status as someone born in the United States for purposes of congressional service. The Constitution’s “natural-born citizen” restriction applies only to the presidency.5Congressman Ted Lieu. The Natural-Born Citizen Ceiling As of March 2026, the House includes twenty-six foreign-born members, with countries of origin ranging from Mexico and Peru to India, Somalia, and Ukraine.6U.S. House of Representatives. Foreign-Born Members of the House of Representatives
What About Dual Citizenship?
No federal law currently prohibits a dual citizen from serving in Congress. The Constitution requires only that a member be a U.S. citizen for the specified number of years and reside in the relevant state. It says nothing about simultaneous citizenship in another country, and some current members were born in nations that confer citizenship by birthright.
The subject draws periodic legislative interest. In late 2025, a House bill called the “Disqualifying Dual Loyalty Act” was introduced to require congressional candidates to renounce any foreign citizenship before running. It was referred to the Judiciary Committee and has not become law.7U.S. House of Representatives (Randy Fine). ICYMI: Rep. Fine Introduces the Disqualifying Dual Loyalty Act to Ban Foreign Citizens from Serving in Congress Separately, the Foreign Emoluments Clause bars anyone holding an “Office of Profit or Trust” under the United States from accepting gifts, titles, or payments from foreign governments without congressional consent, though commentators have debated whether that clause reaches elected legislators.8Constitution Annotated | Congress.gov | Library of Congress. Foreign Emoluments Clause Generally
Losing Citizenship While in Office
A sitting member who renounces U.S. citizenship immediately fails the constitutional requirement. Federal law provides that a citizen loses nationality by making a formal renunciation before a U.S. diplomatic or consular officer abroad, or, during wartime, through a written renunciation within the United States approved by the Attorney General.9Office of the Law Revision Counsel. 8 USC Chapter 12, Subchapter III, Part III – Loss of Nationality Outside wartime, a citizen physically present in the United States generally cannot lose nationality through a domestic act. A Representative or Senator who wanted to renounce would need to travel abroad and appear before a consular officer. If that occurred, the chamber could declare the seat vacant.
How Congress Enforces the Citizenship Rule
Article I, Section 5 gives each chamber the power to judge “the Elections, Returns and Qualifications of its own Members.” That means the House and Senate, not the courts, decide whether a newly elected member meets the constitutional criteria.10Cornell Law School. Article I, Section 5, Clause 1 – Congressional Authority over Elections, Returns, and Qualifications A simple majority can refuse someone a seat.
The most prominent example involving citizenship is the 1794 case of Albert Gallatin of Pennsylvania. The Senate unseated him by a 14–12 vote after concluding he had not been a U.S. citizen for the required nine years at the time of his election. Gallatin argued that his thirteen years of continuous U.S. residency and an oath of allegiance to Virginia should count, but the Federalist majority disagreed.11U.S. Senate. Albert Gallatin Election Case, 1793-1794
Congress cannot invent new qualifications beyond age, citizenship, and residency. The Supreme Court held in Powell v. McCormack (1969) that when the House refused to seat Adam Clayton Powell Jr. for reasons outside the three constitutional requirements, it exceeded its authority. Congress’s power to judge qualifications extends only to those “expressly prescribed by the Constitution.”12Legal Information Institute. Ability of States to Add Qualifications for Members Citizenship duration, however, is one of the three prescribed qualifications, so it remains fully enforceable.