The Soest Börde (German: Soester Börde) is an historical territorial lordship and a cultural landscape in the centre of the German region of Westphalia, between Sauerland in the south and Münsterland in the north.
It is known nationally for being a very fertile region thanks to the depth of its loess soils that, it terms of yield are only exceeded in Germany by the Magdeburg Börde.
Administratively it refers to a former juridical district and agriculturally to a fertile lowland.
From a natural regional perspective, it belongs to the Hellwegbörden, whose eponymous centre it represents.
[1] Within the natural region classification, however, the Soest Börde, is not recognized as a unit.