(1761-1849) Swiss-born US political leader and diplomat. He served in the US House of Representatives 1795–1801 and was secretary of the treasury 1801–13 during the administrations of Jefferson and Madison. He negotiated the treaty ending the Anglo-American War of 1812–14 and served as US minister to France 1815–22 and to England 1826–27.
Gallatin served in the Pennsylvania state legislature 1790–94. A critic of the Federalists, he helped establish the fiscal power of the US House of Representatives. After the end of his political career, he devoted himself to banking and Native American ethnology.