Jodoigne (French pronunciation: [ʒɔdɔɲ], Dutch: Geldenaken [ˈɣɛldǝˌnaːkǝ(n)]) is a Walloon city and municipality located in the Belgian province of Walloon Brabant. On January 1, 2006, Jodoigne had a total population of 12,440. The total area is 73.31 km² which gives a population density of 170 inhabitants per km².
The present municipality includes the nine villages of Piétrain, Saint-Jean-Geest, Saint-Remy-Geest, Zétrud-Lumay, Dongelberg, Mélin, Lathuy, Jodoigne-Souveraine and Jauchelette.
In the 1568 Battle of Jodoigne, one of the early battles of the Eighty Years' War, the Spanish Duke of Alba defeated a Dutch rebel force under William the Silent.
The previous mayor of Jodoigne, Louis Michel, a liberal politician was the Belgian foreign minister from 1999 until 2004 and was the Belgian European commissioner from 2004 until 2009. The current mayor is Jean-Paul Wahl.
The asteroid 1199 Geldonia was named in its honour (from the Latin form of the name) by Eugène Delporte.
Château Pastur, a former residence of Henry I of Brabant
, now the hôtel de ville