C. N. Caspar Company (fl. c. 1888 – 1939) was a Milwaukee, Wisconsin, based bookshop and publisher of maps, atlases, postcards, and touristic brochures. Most of their cartographic work is local in nature and focuses on Milwaukee and the immediate vicinity. C. N. Caspar himself was likely a German immigrant and the firm did considerable business in German language material. The retail outlet was called C. N. Caspar Company Book Emporium and located at 454 East Water St., Milwaukee.