Rognon

Rognon is culinary French for kidney and may refer to:
 * Rognon (Marne), a river in France, tributary of the Marne
 * Rognon (Scey), a river in France, tributary of the Scey (Rhône basin)
 * Bourdons-sur-Rognon
 * Lanques-sur-Rognon
 * Rognon, Doubs
 * Charles Amédée Rognon
 * Rebecq-Rognon
 * a rock rognon (synonym: nunatak) projecting through a glacier