Bernhardsthal is a town in the district of Mistelbach, in the Austrian state of Lower Austria. It lies in the northeastern part of the country, within the Weinviertel region near the border with the Czech Republic.
The municipality is known for its rural character and its position in Lower Austria's wine-growing countryside. Like other towns in the district of Mistelbach, it is part of a region shaped by agriculture and small-scale settlement.