Rey Juan Carlos University is a Spanish public research university located in the southern area of the Community of Madrid (Spain), with five campuses at Móstoles, Alcorcón, Vicálvaro, Aranjuez and Fuenlabrada.

Móstoles is a municipality of Spain located in the Community of Madrid. With over 200,000 inhabitants, it is the region's second most populated municipality after Madrid. Móstoles was a small town for a long time, but expanded rapidly in the second half of the 20th century.