This list includes United States citizens who married members of foreign noble or royal families, including deposed and formerly aristocratic houses.
Throughout history, particularly in the 19th century, advantageous marriages were made between American heiresses and European aristocrats, especially British peers. These women were often referred to as "Dollar princessess" in the press. There were 454 marriages between Gilded Age and Progressive Era American women and European aristocrats.
There are also individuals who were born outside the United States but maintain US citizenship through an American parent: