Trittau is an Amt ("collective municipality") in the district of Stormarn, in Schleswig-Holstein, Germany. The seat of the Amt is in Trittau.The Amt Trittau consists of the following municipalities:Grande Grönwohld Großensee Hamfelde Hohenfelde Köthel Lütjensee Rausdorf TrittauWitzhaveSister citiesThe following cities are twinned with Trittau (Amt): Saarijärvi, Central Finland, Finland Commune of Loire-Divatte consisting of the following municipalities: Barbechat; La Remaudière; Le Landreau; Le Loroux-Bottereau; Saint-Julien-de-Concelles and La Chapelle-Basse-Mer, France Wieliszew, Poland Totton and Eling, United Kingdom