John O'Fallon | |
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Born | Jefferson County, Kentucky | November 17, 1791
Died | December 17, 1865 St. Louis, Missouri | (aged 74)
Buried | |
Allegiance | ![]() |
Service/ | ![]() |
Years of service | 1812—1818 |
Rank | Captain |
Unit | |
Signature | ![]() |
John O'Fallon (November 17, 1791 – December 17, 1865) was a businessman, philanthropist, and military officer, a nephew of the explorer William Clark. During the 19th century he rose to become the wealthiest person in St. Louis, Missouri.[1] The cities of O'Fallon, Illinois and O'Fallon, Missouri are named after him.[2] In 1857, he donated over $1 million to establish the O'Fallon Institute at what is now Washington University in St. Louis.[3]