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Legacy

At the time of his death in 1848, Astor was the wealthiest person in the United States, leaving an estate estimated to be worth at least $20 million, or 0.9% of estimated US GDP at the time, which is equivalent to $ 598 million in 2020. By comparison, the fortune of Jeff Bezos was worth approximately $200 billion in 2020, similar to Astor at approximately 0.9% of US GDP.

In his will, Astor bequeathed $400,000 to build the Astor Library for the New York public, which was later consolidated with other libraries to form the New York Public Library. He also left $50,000 for a poorhouse and orphanage in his German hometown of Walldorf. The Astorhaus is now operated as a museum honoring Astor. It is a renowned and popular fest hall for marriages. Astor donated gifts totaling $20,000 to the German Society of the City of New York, during his term as president, from 1837 until 1841.

Astor left the bulk of his fortune to his second son William, because his eldest son, John Jr., was sickly and mentally unstable. Astor left enough money to care for John Jr. for the rest of his life. William continued building the family fortune, and was an ancestor of John Jacob Astor III, John Jacob Astor IV, and John Jacob Astor VI.

Astor is buried in Trinity Church Cemetery in Manhattan. Many members of his family had joined its congregation, but Astor remained a member of the local German Reformed congregation to his death. In the short story Bartleby, the Scrivener, Herman Melville used Astor as a symbol of men who made the earliest fortunes in New York.

The pair of marble lions that sit by the entrance of the New York Public Library Main Branch at Fifth Avenue and 42nd Street were originally named Leo Astor and Leo Lenox, after Astor and James Lenox, who founded the library from his own collection. Next, they were called Lord Astor and Lady Lenox (both lions are males). Mayor Fiorello La Guardia renamed them "Patience" and "Fortitude" during the Great Depression.

The neighborhood of Astoria in Queens, New York City, is named after Astor.

The one-block Astor Place street in Manhattan, New York City, was named after Astor, soon after his death.

The coastal town of Astoria, Oregon, is named after Astor, as well as an elementary school named in his honor. The background to the founding of this town is described in Washington Irving's Astoria, a book whose writing was financed by Astor.

The historic neighborhood of Astor Park in Green Bay, Wisconsin, is named after Astor. In 1835, John Jacob Astor founded the Town of Astor in Wisconsin. After the Town of Astor was united with the Town of Navarino to form the Borough of Green Bay, one neighborhood was named after him.

In 1908, when the association football club FC Astoria Walldorf was formed in Astor's birthplace in Germany, the group added "Astoria" to its name in his, and the family's, honor.