Daniel Rossouw Kannemeyer (26 December 1843 Cape Town – 1 January 1925 Bloemfontein) was a South African medical practitioner, naturalist, archaeologist and palaeontologist, the son of Daniel Gerhardus Kannemeyer and Johanna Susanna Rossouw[1][2][3] He is best remembered for his contributions to palaeontology and archaeology although his collections of zoological specimens are greatly valued by the museums which acquired them.

The couple returned to Burgersdorp and Kannemeyer practised there, in Aliwal North and Smithfield for the next forty years.

His wife was locally acclaimed for her soprano voice, while he served on the school board and delivered numerous public lectures on archaeology and natural history.

Kannemeyer volunteered to serve in the Ninth Frontier War of 1877-1879, and in the campaigns against Moorosi and the Basuto in 1879 and 1880, his medical training proving to be invaluable.

Kannemeyer was responsible for collecting most of the Free State entomological and herpetological specimens housed in the South African Museum.