The Soeste is a river in Lower Saxony in the Cloppenburg district.
The Soeste forms from two source brooks in Hesselnfeld and Egterholz, two small settlements in the Emstek municipality. It flows northwest through Cloppenburg, where its water flow was already sufficient for water mills to be operated. The Soeste flows into a dam at Thülsfelde, which was built in the 1920s. From there it flows through the towns Friesoythe and Barßel. Near the latter town, the Soeste flows into the Leda, which drains into the Ems.
Coordinates: 53°10′N 7°44′E / 53.167°N 7.733°E