Yonne is a French department named after the Yonne River. It is one of the four constituent departments of Burgundy in eastern France and its prefecture (capital) is Auxerre. Its official number is 89.
It elects three members of parliament to the National Assembly - in the 2002-7 parliamentary term, all three are drawn from the right-wing Union for a Popular Movement (UMP). Its two senators also represent the UMP.