Klein Rönnau is a municipality located in the district of Segeberg within the German state of Schleswig-Holstein. The settlement covers an area of approximately 1.83 square kilometers (453 acres) and serves as a residential community for about 1,600 people.
The local infrastructure includes three car workshops, several medical practices, and supermarkets. The municipality also hosts various community organizations, including clubs dedicated to riding, dog training, and a local sports club. Most of the inhabitants identify as either Protestant or non-religious.