The richest women may span the globe, but two of them come from the same family: the Waltons.

Two of the Walmart heirs capture spots one and and three on Wealth-X’s list of the world’s richest women. Valued at $29.8 and $28.2 billion respectively, the two women are part of a family that’s worth the same amount as the bottom 30 percent of Americans, according to an analysis from a labor economist at the University of California-Berkeley.

Other super-wealthy women that made Wealth-X’s cut include Australian mining mogul Gina Rinehart, valued at $29.1 billion, and French socialite Liliane Bettencourt, who is valued at $24 billion.

Though she hasn’t made the list yet, Sara Blakely may be poised to crack the rankings in a few decades. Blakely became the youngest female billionaire this year at 41, thanks to her wildly successful Spanx shapewear businesses.

Here are the world's wealthiest women, according to Wealth-X:

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  • 5. Birgit Rausing

    Rausing, who <a href="http://www.forbes.com/profile/birgit-rausing/" target="_hplink">inherited her father-in-law's Swiss packaging company</a> when her husband died in 2000, is worth an estimated $13.8 billion, according to Wealth-X.

  • 4. Liliane Bettencourt

    Bettencourt owns <a href="http://topics.bloomberg.com/liliane-bettencourt/" target="_hplink">31 percent of L'Oreal cosmetics</a>, according to Bloomberg. Europe's wealthiest woman is worth $24 billion, according to Wealth-X.

  • 3. Christy Walton

    Walton inherited her share of the Walmart fortune <a href="http://www.forbes.com/profile/christy-walton/" target="_hplink">after the passing of her husband John</a> and is currently worth $28.2 billion, according to Wealth-X. In addition to her Walmart stake, Walton netted big bucks from a smart bet her husband made on First Solar, according to Forbes.

  • 2. Gina Rinehart

    Judged by some indexes to be <a href="http://www.dailymail.co.uk/news/article-2148908/Gina-Rinehart-crowned-worlds-richest-woman.html" target="_hplink">the world's richest woman</a>, Rinehart made her billions as daughter of an Australian mining magnate. She's worth $29.1 billion, according to Wealth-X.

  • 1. Alice Walton

    Walton was able to push her way to the top of the list at $29.8 billion thanks to Walmart stock trading at a 12-year high, according to Wealth-X. The daughter of Walmart founder <a href="http://www.time.com/time/specials/packages/article/0,28804,2111975_2111976_2112094,00.html" target="_hplink">Sam Walton established an art museum</a> in Bentonville, Arkansas, the town that's home to Walmart's