How long does it take to get a green card after marriage?

The length of the process depends on several factors: if your spouse is a U.S. citizen or a green card holder; if you are in the U.S. in legal status or not; if you violated immigration laws; how you entered the country, and so forth. The same factors will apply if you are outside the United States. Because the answer to this question depends on the facts of your case, it is best to contact an experienced immigration law attorney to get an answer that is based on those facts.