How many years can I apply for citizenship after applying for immigration to the United States and obtaining a permanent green card?

5 years (or married to an American citizen for 3 years).

Legal permanent residents who have lived in the United States as permanent residents for five years (or have been married to American citizens for three years) and meet all the conditions listed by the Immigration Bureau can apply for becoming American citizens.

The legal permanent residency of green card holders is an official immigration benefit, including conditional permission to stay in the United States and get a job. The holder must maintain his permanent resident status, and if he no longer meets certain conditions required by the status, the holder may lose his status.

Green card holders are foreigners who have neither American citizenship nor American citizenship. However, in the United States, they basically enjoy the same treatment as their nationals, but they have no right to vote and stand for election.

Extended data:

How to apply for citizenship after obtaining a permanent green card;

1. Generally, foreigners applying for naturalization should fill in the N-400 form and submit their own green card copy (in a few cases, it is not necessary to submit a green card copy). Applicants also need to submit all possible supporting documents, two identical passport photos, application fee and fingerprint printing fee.

2. After the fingerprint of the applicant is printed, the Immigration Bureau will send the fingerprint to the FBI to conduct a background check on the applicant. If the applicant successfully passes the background check, he will receive an appointment notice and an interview from the Immigration Bureau. English proficiency test and American history knowledge test will be conducted in this interview.

3. The immigration officer who supervises the examination will judge whether the applicant meets the requirements of naturalization, and generally can make a final decision on the day of the interview. If the applicant is approved for naturalization, the Immigration Bureau will arrange the swearing-in time. After taking the oath, the applicant will get a certificate of naturalization (certificate? Yes? Naturalization

Reference source: Baidu Encyclopedia-American Permanent Resident Card