Canadians Applying for U.S. Citizenship Based on Marriage
Canadian citizens who have obtained U.S. permanent residency through marriage have the potential to qualify for U.S. citizenship through naturalization.
If you acquired permanent residency by marrying a U.S. citizen, you can apply for naturalization after three years from the date of obtaining permanent residency. During this three-year period, it is necessary for the applicant to have been physically present in the United States for at least half of that time, which equals 18 months or 1.5 years. Additionally, it is important to note that the applicant should not have resided outside of the U.S. continuously for more than one year. If this continuous residency requirement is broken, the applicant will be required to restart the three-year period after re-entering the United States.
Please click on U.S. Citizenship for more details.