Alexander Dalrymple Orr (November 6, 1761 – June 21, 1835) was an American farmer and politician from Maysville, Kentucky. Orr was born in Alexandria, Virginia and in 1782 moved to Bourbon County, KY, which then remained a part of Virginia. His uncle was William Grayson, who served as a U.S. senator and delegate for Virginia. He served in the Virginia House of Delegates beginning in 1790, and the Virginia Senate beginning in 1792. After statehood, he represented Kentucky in the United States House of Representatives from November 8, 1792, to March 3, 1797. Orr died in Paris, Kentucky.