R C Ziegler and Son is a firm of monumental masons in Queensland, Australia. They built many heritage-listed war memorials in Queensland.
The firm was established in Toowoomba circa 1902 and undertook monumental masonry commissions throughout south-western Queensland. The family company moved to Bundaberg where it was operating until the mid 1980s.[1] In 2016, it is based once again in Toowoomba serving Queensland and northern New South Wales under the name RC Ziegler Monumentals.[2] The firm closed in 2013.