Iłża is a small town located in the Masovian Voivodeship of Poland. Situated in the Małopolska Upland, it lies along the Iłżanka river approximately 30 kilometers south of Radom.
The town belongs to the historical region of Lesser Poland and was part of the Sandomierz Voivodeship from its foundation until 1795. As of 2006, the population of Iłża was approximately 5,165 inhabitants.