K. G. Saur Verlag is a German publisher that specializes in reference information for libraries. The publishing house, founded by Karl Saur, is owned by Walter de Gruyter and is based in Munich.

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In 1987, K. G. Saur was acquired by Reed International. Its British holdings were merged into the separate company Bowker-Saur. In 2000 Reed Elsevier sold K. G. Saur to the Gale Group, a unit of the Thomson Corporation.^[1] Walter de Gruyter acquired it in 2006.^[2]