Berndorf is a town in the district of Baden in Lower Austria in Austria. Because of its historic development in the 19th century it is also referred to as the Krupp town.

The town consists of 4 districts:

Artefacts from various epoques of the Stone Age prove that there was a settlement in this region.

Perindorf is likely to have its name from a man named Pero, who settled here in 1070. The name Perendorf was first mentioned in 1133.

Throughout the following centuries, Berndorf was ravaged by the Magyars and the Ottomans.

In the 18th century, metal-working companies such as Neuhirtenberger Kupferhammer, which used the first steam engine in all of Lower Austria in 1836, settled in this region. Before that, hydropower coming from the Triesting was the main energy source.

In the 19th century the majority of the inhabitants of Berndorf and its neighbouring villages worked in the metal industry. In 1844, Berndorf consisted of no more than 50 houses with about 180 inhabitants, when the cutlery factory of Alexander Schoeller and Hermann Krupp was founded. Initially, there were 50 workers, but throughout the years, the company developed and turned into a multi-national combine with over 6,000 employees. The development of the city of Berndorf was closely related to the history of the Krupp family. Arthur Krupp, son of Hermann Krupp, founded a private elementary school and a public swimming pool, as well as the neo-baroque St. Margaret's church.

In 1923, the communities of Berndorf, St. Veit, Ödlitz and Veitsau were united and formed the city of Berndorf.