Benetússer is a municipality located within the comarca of Horta Sud in the Valencian Community of Spain. It occupies a small land area of 0.78 km2.
The municipality is characterized by its high population density. As of the 2001 census, it had a population of 13,425 inhabitants, resulting in a density of 17,211.5 persons per square kilometer, which ranked as the third highest in Spain at that time.