Steimbke is a municipality located in the district of Nienburg within the state of Lower Saxony, Germany. It is situated approximately 12 km east of the town of Nienburg and roughly 40 km northwest of Hanover.
The geographical landscape surrounding Steimbke is characterized by swamp and heathland. The area is notably defined by the presence of the Blindesee, which serves as a central feature of the local environment.