William Conner (December 10, 1777 – August 28, 1855) was an American trader, interpreter, military scout, community leader, entrepreneur, and politician. Although Conner initially established himself as a fur trader on the Michigan and Indiana frontiers, his business interests later expanded to include ownership of Indiana farms, mills, distilleries, and mercantile shops. He was also a land speculator. Conner served the American forces in several capacities during the War of 1812, and as an interpreter and witness at several treaty negotiations with Native American tribes that resulted their removal from Indiana and established the state's geographical boundaries.