Kelsterbach is a town in Groß-Gerau district in Hessen, Germany and part of the Frankfurt Rhein-Main urban area. It is located on Frankfurt's southwestern outskirts at a bend on the left bank of the river Main, right where a small brook, called the Kelster (and Bach means "brook") joins the river. After the Frankfurt–Mainz railway line was built, this formerly mostly agricultural village was transformed by the great number of large factories that located here, bringing along with them a great upswing in the town's population. In the decades following the Second World War, many businesses that were related to Frankfurt International Airport moved to the town. Kelsterbach is home to 15,089 people (As of 30 June 2005). The town is an important centre for logistical service providers and chemical production. In 1952, it acquired the status of "town."