Reinbek (German: [ˈʁaɪnbeːk] ⓘ; probably from "Rainbek" = brook at the field margin; Northern Low Saxon: Reinbeek) is a town located in Stormarn district in the northern German state of Schleswig-Holstein within the metropolitan region of Hamburg.

It can be accessed by the A1, the A24 autobahn, federal highway 5 and the S-Bahn line S2.

The town is located at the river Bille which was dammed up here to form a mill pond.

Religious affiliation: Reinbek station is serviced by the rapid transit system of the Hamburg S-Bahn.

Reinbek is twinned with:[3] Since 1974, Reinbek also cooperates with Padasjoki in Finland, and has friendly relations with its former twin town of Täby in Sweden.