Club Deportivo Leganés, S.A.D. is a football club based in Leganés, Community of Madrid, Spain, that currently competes in Segunda División, the second tier of the Spanish league system. It was founded on 23 June 1928. It holds home games at the Estadio Municipal de Butarque, which seats 12,454 spectators.

Leganés is a city in the Community of Madrid, Spain. Considered part of the Madrid metropolitan area, it is located about 11 km southwest of the centre of Madrid. As of 2018, it has a population of 188,425, making it the region's fifth most populated municipality. It covers an area of 43.09 km2 and it is located at 667 m over sea level.