Is a marriage valid in the US if couple was married Peru?

Generally speaking, a marriage that is valid in the country where it is performed is recognized as valid in the United States. This principle is known as the "comity of nations."

If you were legally married in Peru, your marriage should be recognized as valid in the United States. However, it is always a good idea to obtain legal advice from a qualified immigration attorney to confirm the specific details of your case and ensure that you are in compliance with all applicable laws and regulations.