Andújar is a city in the province of Jaén in Andalusia (Spain). Head of the Countryside of Jaén, with almost 957 km² of surface, it is the municipality with the largest extension in the entire province.

In 2006 it had 39,662 inhabitants and a density of 40.14 inhabitants / km². Its geographical coordinates are 38 ° 2 'N, 4 ° 3' W. It is located at an altitude of 212 meters and 66 kilometers from the provincial capital.

Its names are Iliturgitano (which despite being incorrect, for location purposes, due to its widespread use and with greater roots, is recognized by the RAE, although the meaning offered by it is based on the erroneous identification, already surpassed by the current research, from Iliturgi with the current Andújar instead of Isturgi, as it really is) and Andujareño.

Its municipal term is divided by the Guadalquivir, with the Sierra de Andújar Natural Park belonging to the Sierra Morena to the north and the plain and countryside to the south. An industrious and well-connected city, it is the third most populated in the province of Jaén.