Robert Weakley (* July 20, 1764 in Halifax County, Virginia; † February 4, 1845 in Nashville, Tennessee ) was an American politician. Between 1809 and 1811 he represented the state of Tennessee in the U.S. House of Representatives.
Robert Weakley attended the public schools in Princeton (New Jersey). From the year 1780, he participated as a soldier in the Continental Army at War of Independence. In 1785 he moved to the western part of North Carolina, from which later emerged the state of Tennessee. In his new home Weakley worked in agriculture. In 1789 he was a member of the Assembly, which ratified the Constitution of the United States for the state of North Carolina. After the founding of Tennessee, he was elected in 1796 in the House of Representatives of the new State. Politically, he was a member of the founded by President Thomas Jefferson Democratic- Republican Party.
In the state- wide discharged congressional elections of 1808 Weakley was the second deputy's mandate of Tennessee in the U.S. House of Representatives in Washington DC chosen, where he became the successor of George W. Campbell on March 4, 1809. Until March 3, 1811, he was able to complete a term in Congress. In 1819 was Weakley negotiator in the service of the Federal Government to negotiate with the Chickasaw Indians. In the years 1823 and 1824 he sat in the Senate from Tennessee. In 1845 he was part of a commission for the revision of the State Constitution. He died on February 4, 1845 at his estate near Nashville.