How long does it take to get a green card when you marry an American citizen?

If the spouse is an American citizen, it takes 4- 1 1 month from the application to getting a green card, and getting a conditional green card for two years.

If the spouse is an American green card holder, it takes 20 months from application to getting a green card, and it takes two years to get a conditional green card.

The American permanent resident card, also known as the green card, is an identity document used to prove that foreigners have the status of permanent residents in the United States. "Getting a green card" refers to the immigration process of becoming a permanent resident. 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.