D Dipasupil/Getty Images Based on Forbes' annual ranking of the richest people in the world, here's a roundup of the richest women in America. Three of the women on the list are part of the Walmart fortune. Three of the others are from the Cox family, of Cox Enterprises. The richest women in America have more in common than just their wealth. From Jacqueline Mars to Christy Walton, the 10 richest women in America are all descendants or widows of the founders of some of the biggest companies in the country — from Walmart to Apple to Mars candy. In fact, three of the richest women are from the Walton family (of Wal-Mart), and another three are from the Cox family (of Cox Enterprises fortune).