Miami, FL immigration attorney Ruth Jean shares how long it takes to get a marriage green card. She notes that the timeline for obtaining a marriage-based green card depends on the status of the petitioning spouse. When the petition comes from a U.S. citizen, the process is generally shorter—typically taking around nine to twelve months, though it can take longer depending on individual circumstances. However, if the petition is filed by a lawful permanent resident, the process usually takes longer than it would for a U.S. citizen’s spouse.