Topoľčianky is a village and municipality in the Nitra Region, in western-central Slovakia. Topoľčianky is unique for its European Bison Reserve. 
Nearby Topoľčianky itself, there is a Renaissance castle at which the first president of Czechoslovakia, T. G. Masaryk, stayed on vacation every summer between 1923 and 1933. The landscaped gardens which surround the castle are spectacular, and include an early 20th-century hunting lodge surrounded. The castle’s southern wing, reconstructed in the early 19th century, is regarded as the purest example of neoclassical architecture in Slovakia, and is open to the public.