Ilguva is a village in Šakiai District Municipality, in Marijampolė County, Lithuania. Ilguva lies at 58 m above sea level. It has 139 inhabitants (2021). The nearest city is Kaunas, 41 km to the east. Among the landmarks around are Ninth Fort (37 km), Church of the Discovery of the Holy Cross, Ilguva (0.4 km) and Panemunė Castle (22 km). Among the natural features are Ilguva oak (0.3 km).