Rittmarshausen is a nucleated village in the municipality (Gemeinde) Gleichen in the district Göttingen, Germany. The village of 776 residents is primarily agricultural and home of people working in Göttingen. "Ökozentrum Rittmarshausen" is an association dedicated to the development and marketing of regionally produced natural foods, which are marketed under the Leinehöfe label. The community also sports an athletic association, a volunteer fire department, a chorus, a gun club, and an equestrian association.