Jehu Glancy Jones (October 7, 1811 – March 24, 1878) was a Democratic member of the U.S. House of Representatives from Pennsylvania. Often called "Glancy", he was a top adviser on Democratic Party affairs to his close friend James Buchanan, especially when President-elect Buchanan was picking his cabinet in 1856-1857. After he was defeated for reelection, Buchanan appointed him Ambassador to the Austrian Empire.