20 Billionaire American Dynasties and How They Made Their Money

Photo by Tony Palmieri/Penske Media/REX/Shutterstock Estee Lauder wearing a yellow dress and fur hat, introducing a fragrance in her home Estee Lauder at Home, New York
Photo by Tony Palmieri/Penske Media/REX/Shutterstock Estee Lauder wearing a yellow dress and fur hat, introducing a fragrance in her home Estee Lauder at Home, New York

A billion dollars can cast a long shadow — and not just if you get it all in $1 bills and see how high you can pile it. The legacy of a billion-dollar fortune can often stretch across generations and historical eras. Once you accumulate a large fortune, it only gets that much easier to expand it by relying on compound interest and smart investing to keep building returns and growing your money year after year. After all, even a modest 5% annual return translates to $50 million in income a year when the starting point is $1 billion.

The end result of that is that the wealthiest families in America tend to stay that way and only get wealthier. Even as the initial patriarch who kick-started the dynasty fades from memory, their legacy of an enormous accumulation of wealth can continue to grow generation after generation.

Last updated: Nov. 16, 2020

Photo by Engelbrecht/AP/REX/Shutterstock Rockefeller John D. Rockefeller, center, is surrounded by relatives and friends in Ormund Beach, Fla., on . From left to right are, John P. White, Cleveland, a close friend; Betty White; Fannie Evans, a second cousin; Max Oser and Mathilde Oser, daughter of the late Edith Rockefeller McCormick, visiting with her husband from Switzerland; Mrs. White; and Mrs. Mitchell, who often reads to Rockefeller. Rockefeller is seated between Peter and Anita Oser, his great-grandchildren Rockefeller Friends and Family
Photo by Engelbrecht/AP/REX/Shutterstock Rockefeller John D. Rockefeller, center, is surrounded by relatives and friends in Ormund Beach, Fla., on . From left to right are, John P. White, Cleveland, a close friend; Betty White; Fannie Evans, a second cousin; Max Oser and Mathilde Oser, daughter of the late Edith Rockefeller McCormick, visiting with her husband from Switzerland; Mrs. White; and Mrs. Mitchell, who often reads to Rockefeller. Rockefeller is seated between Peter and Anita Oser, his great-grandchildren Rockefeller Friends and Family

The Rockefeller Family

  • Approximate Net Worth: $11 billion

  • Source of Wealth: Oil

The legendary John D. Rockefeller wasn’t just the richest man of his day, he might be among the highest individual net worths of all time. At his peak, Rockefeller’s assets accounted for 1.5% of the nation’s total economic output — the equivalent today of a $340 billion fortune that would lap Jeff Bezos twice with room to spare.

The Rockefeller fortune was born out of Standard Oil, the company he founded in 1870. Rockefeller ruthlessly either acquired or drove out all of the competition in the oil refinery business so that he could control a near-complete monopoly. Today, the fortune he initially built is spread out across 174 different heirs and supports a lot of important philanthropic work.

Photo by Mediapunch/REX/Shutterstock Nicole Hanley Mellon, Matthew Mellon We Are Family Foundation Gala, New York, America - 06 Mar 2014
Photo by Mediapunch/REX/Shutterstock Nicole Hanley Mellon, Matthew Mellon We Are Family Foundation Gala, New York, America - 06 Mar 2014

The Mellon Family

  • Approximate Net Worth: $11.5 billion

  • Source of Wealth: Banking, investing

If there’s one family that knows a thing or two about money management, it’s the Mellons. Starting with Irish immigrant Thomas Mellon’s arrival on American shores in 1818, the family founded the Mellon Financial Corporation — which was acquired by the Bank of New York in 2006 to form BNY Mellon — and was a crucial early investor in companies like Alcoa and Gulf Oil.

That net worth would likely be much higher were it not for the family’s long history of philanthropy. Today, the Mellons are still at it, with descendant Matthew Mellon working as an investor and entrepreneur.

KAZAN, RUSSIA - MARCH 8, 2018 - Bottles of Jack Daniels Tennessee whiskey No.
KAZAN, RUSSIA - MARCH 8, 2018 - Bottles of Jack Daniels Tennessee whiskey No.

The Brown Family

  • Approximate Net Worth: $12.3 billion

  • Source of Wealth: Liquor

If the name Brown isn’t ringing a bell, perhaps it’s because their most recognizable contribution to the American landscape goes by a different, iconic name: Jack Daniels. The Brown family owns the Brown-Forman Corp. that produces Jack Daniels, Finlandia and Herradura, among other prominent liquor brands.