Wolmaransstad is a maize-farming town in the North West Province of South Africa, situated on the N12 National Route between Johannesburg and Kimberley.
The town is located 245 km south-west of Johannesburg and 56 km north-east of Bloemhof. It falls under the Maquassi Hills Local Municipality in the Dr Kenneth Kaunda District Municipality of North West Province.
Wolmaransstad lies in an important alluvial diamond-mining area and it is the administrative seat of the Maquassi Hills Local Municipality.
Wolmaransstad was laid out on the farms Rooderand and Vlakfontein in 1888, and proclaimed a town in 1891 on the banks of the Makwasi River (San word for a type of wild spearmint).
The town was named after Jacobus M. A. Wolmarans, then member of the Executive Council.
Wolmaransstad serves a large community and is an important diamond buying center.
The Dutch Reformed church building in Wolmaransstad was designed by Gerard Moerdijk.