I Am Married. What is Faster, the K-3 Spousal Visa or the Green Card Process?

The K-3 visa petition generally permits those married to US citizens to enter the US faster than if they had to wait for the entire green card process to be completed before entering. Note however, that upon entry with the K-3 visa, the spouse of the US citizen must still complete the green card process in the US. See FAQs for K-1 fiance/K-3 Visas.