Spreitenbach is a municipality in the district of Baden in the canton of Aargau in Switzerland, located in the Limmat Valley (German: Limmattal).It lies southeast of the district center, directly on the border with the canton of Zurich.It is one of the smallest cities in Switzerland. In Switzerland, a city needs 10,000 or more to be considered as a city. The goalkeeper Diego Benaglio, of the National Football Team of Switzerland, spent his youth there.