Vereeniging, meaning Association with the associated meaning of joining, is named after the being located at the rail and road crossing point between the two old republics: Zuid-Afrikaansche Republic and the Republic of the Orange Free State.
In the late 1800s the Vaal River was crossed at Viljoensdrift, on the Free State side of the present Vereeniging. In 1878 coal was dicovered on the farm Leeuwkuil and a town developed around the mine on the northern bank of the Vaal River. The first stands were sold in 1892 and the railway track crossing the Vaal River as also completed that year. The town was called Vereeniging (meaning Association) because at this point transport between the two republics met.