Ehningen is a town in the district of Böblingen in Baden-Württemberg in Germany.

Ehningen is in Korngäu, on the northwestern edge of Schönbuch nature park. Historically, the city of Ehningen was located north of the Würm, but the Würm now flows through the middle of the modern town. The second major watercourse is the Ehningen Krebsbach, which flows south-west of the old village in the Würm.