Gronau is a former Samtgemeinde ("collective municipality") in the district of Hildesheim, in Lower Saxony, Germany. Its seat was in the town Gronau. On 1 November 2016, it was merged into the new Samtgemeinde Leinebergland.
The Samtgemeinde Gronau consisted of the following municipalities:
Banteln Betheln Brüggen Despetal Eime Gronau Rheden
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