is a French department
named after the Yonne River
. It is one of the four constituent departments of Bourgogne
(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.