Bad Münder am Deister, commonly referred to as Bad Münder, is a town located in the Hamelin-Pyrmont district of Lower Saxony, Germany. It is situated on the south side of the Deister hills within the Deister-Süntel valley, approximately 15 kilometres northeast of Hamelin.
The municipality consists of 16 districts and had a population of about 17,400 inhabitants as of 2020. The district of Bad Münder serves as the administrative center for the town and houses roughly 8,000 residents.