Orp-Jauche is a Walloon municipality located in the Belgian province of Walloon Brabant. On January 1, 2008, Orp-Jauche had a total population of 8,400. The total area is 50.50 km² which gives a population density of 159 inhabitants per km².
The municipality consists of the following sub-municipalities: Énines, Folx-les-Caves, Jauche (Geten), Jandrain-Jandrenouille, Marilles, Noduwez (Nodevoorde), and Orp-le-Grand (Groot-Adorp).