New Castle Leather Raw Stock Warehouse, also known as the Kaumagraph Building, is a historic warehouse building located at Wilmington, New Castle County, Delaware.

It was built in 1917, and is a three-story, rectangular steel, concrete, and brick building measuring 100 feet by 200 feet and featuring a projecting roof cornice, flat roof, and large window areas.

It is characterized as a fireproof industrial building in the commercial style of the early 1900s.

It was originally built as a warehouse to store goatskins for a Wilmington kid leather manufacturer and later housed the plant and offices of a specialty printing firm.

This article about a property in Delaware on the National Register of Historic Places is a stub.