|Coordinates: 53°42′N 9°43′E / 53.700°N 9.717°ECoordinates: 53°42′N 9°43′E / 53.700°N 9.717°E|
|• Mayor||Roland Krügel|
|• Total||20.62 km2 (7.96 sq mi)|
|• Density||630/km2 (1,600/sq mi)|
|Time zone||CET/CEST (UTC+1/+2)|
|Dialling codes||04122, 04120|
Tornesch is a town in the district of Pinneberg, in Schleswig-Holstein, Germany. It is situated approximately 7 km (4 mi) southeast of Elmshorn, and 25 km (16 mi) northwest of Hamburg. Tornesch is also the home of the Klaus-Groth-Schule, named after the German poet Klaus Groth. It is also home to the Fritz-Reuter-Schule, named after German writer Fritz Reuter.
Tornesch has a place in biochemical history from the wood saccharification process developed by Scholler, also known at the Scholler-Tornesch process. The first factory to use the process was built in Tornesch. This early work was part of the development of biofuel such as cellulosic ethanol.