Humphrey Marshall (1760 – July 3, 1841) was a politician from the U.S. states of Virginia and Kentucky. He served in the state legislatures of both states and represented Kentucky in the United States Senate from 1795 to 1801. He was a member of the Marshall political family which included his cousins Chief Justice of the United States John Marshall, federal judge James Markham Marshall, and noted educator Louis Marshall. All the prominent members of this family were Federalists. Marshall was also the father of Congressman Thomas Alexander Marshall and the grandfather of Congressman and Confederate General Humphrey Marshall. During the Revolutionary War, Marshall served with the Virginia State Regiment of Artillery. After the war, he moved to the Kentucky District of Virginia where he became extremely wealthy as a farmer and surveyor. He was a delegate to two of the ten Kentucky statehood conventions and was one of only three delegates from the Kentucky District to vote in favor of ratifying the U.S. Constitution at the 1788 Virginia Ratifying Convention. After Kentucky gained statehood in 1792, Marshall was elected to the state legislature despite the fact that he was a Federalist and zealously antireligious – both of which made him unpopular with many Kentuckians. The Federalist cause received a slight boost when federal forces were successful in quashing the Whiskey Rebellion and ending the Indian threat at the Battle of Fallen Timbers. As a result, the General Assembly elected Marshall to the U.S. Senate in 1794. As a senator, Marshall clung to Federalist principles, supporting the Alien and Sedition Acts and voting to ratify the Jay Treaty. For the latter action, his constituents stoned him and tried to throw him in the Kentucky River. In 1801, he was defeated for reelection by John Breckinridge. He would once again be elected to the state legislature in 1807, 1808, and 1823. During the 1809 legislative session, a disagreement between him and Henry Clay led to a duel between the two men in which both were slightly wounded. As early as 1786, Marshall had been implicating several prominent Kentucky politicians in a scheme to take Kentucky out of the Union and into alliance with Spain. After the expiration of his Senate term, he resumed these charges through the pages of the Western World newspaper. His allegations resulted in a legislative investigation of Kentucky Court of Appeals judge Benjamin Sebastian, who was found