Trittau is a municipality in Schleswig-Holstein, Germany, located 30 km east of Hamburg. It is the economical and administrative center of Amt Trittau, which is part of the Stormarn district. Other villages in the county are Grönwohld, Lütjensee, Großensee, Rausdorf and Grande.
The village then consisted of a Saxon part (Groß-Trittau) and a Wagrian part (Klein-Trittau). In 1326, a castle was built to defend the region and the trade route against the Scarpenberg knights from nearby Linau castle.