Reingsen is a part of Ergste, a district of Schwerte, Germany.
Before 1975, Reingsen belongs to the county Iserlohn (Kreis Iserlohn).
[1] At 2012 Reingsen had a population of 110 inhabitants.
[2] It lies south of the river Ruhr near Sauerland and is mainly used for agriculture.
In Reingsen there are two streams, the Lollenbach and the Reingser Bach.