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. In 2016, it is based once again in Toowoomba serving Queensland and northern New South Wales under the name RC Ziegler Monumentals. The firm closed in 2013.