Walldorf is a town in the Rhein-Neckar-Kreis district in the state of Baden-Württemberg in Germany.
Walldorf is home to the world's seventh largest software company SAP, and the birthplace of the entrepreneur John Jacob Astor, of the Astor family.
The town is referred to, though not actually named, in John le Carré's novel Absolute Friends (2003), much of which is set in Heidelberg.
The neighbouring town to the east is Wiesloch. Both towns are strongly linked economically. Adjacent municipalities are
Sandhausen, Leimen, Nußloch, St. Leon-Rot and Reilingen. The train station, named Wiesloch-Walldorf, is located between the two towns.