The municipality of Berndorf with 9046 inhabitants (as of January 1, 2020) is located on the edge of the Vienna Woods in the Triestingtal in Lower Austria. Due to the historical development in the 19th century, it is also known as Krupp town.

Finds from the various epochs of the Stone Age show that settlements were already present in the area.

In 1133, a Perindorf is mentioned in the Göttweiger Salbuch, which probably got its name from a settler named Pero, who settled here with a group around 1070. The Perendorf foundation estate can also be found in the annals of Kleinmariazell Abbey in 1136.

In the course of the following centuries, Berndorf was often ravaged by the Hungarians and later by the Turks, similar to the other places in the Triestingtal.

As early as the 18th century, a metalworking industry settled here, such as the Neuhirtenberger Kupferhammer, whose successor, the k. k. priv. Neuhirtenberg factory of metal machines, already in 1836, in addition to the water power of Triesting, used the first - locally manufactured - steam engine in Lower Austria. In the 19th century, the metal industry, due to constant expansion, became the main source of income for the local population. Around 1844 there were around 50 houses with 180 inhabitants when the company began producing cutlery with 50 workers under Alexander Schoeller and Hermann Krupp. This company later developed under Arthur Krupp into a global corporation with 6,000 employees. The entire development of Berndorf was closely linked to the history of the Kruppf family. Arthur Krupp built a private elementary school and a public bath in addition to the industrial plants. For the influx of workers and employees, Krupp had the districts of Wiedenbrunn and Margareten built at the company's expense, between 1880 and 1918 a total of 260 houses with over 1,100 apartments. The neo-baroque Margaret Church was also built by Krupp. The urban planning planner and partially executive architect was Ludwig Baumann.

In 1866 Berndorf was raised to a market town and in 1900 to a town. At that time, Berndorf had around 4,300 residents. The Krupp company employed 3,500 people from Berndorf and the surrounding area. With the state law of April 26, 1923, Berndorf, St. Veit an der Triesting, Ödlitz and, until then, part of the local community of Grillenberg, the village of Veitsau and the Rotte Steinhof merged to form the town of "Groß-Berndorf".

After the Anschluss in 1938, the Arthur Krupp company was incorporated into the German Krupp concern.

Due to the local industry, Berndorf was also an important target of the Allied air raids in the later years of the Second World War. During the war years, however, the forces of nature did not stop at Berndorf, with Triesting causing the strongest floods in its history twice (in 1939 and 1944) and causing great damage.

After the end of the war, the metal goods factory was confiscated by the Soviet Army and incorporated into the USIA companies. It was only handed over to the Austrian state in 1957 and merged with the Vereinigte Aluminumwerke Ranshofen (VAW) to form the Vereinigte Metallwerke Ranshofen Berndorf AG (VMW) and Austria Metall AG (AMAG).

Due to financial problems of the nationalized industry in the early 1980s, Berndorf was again spun off from the VMW Group in 1984 and privatized separately as Berndorf AG in 1988 through a manager buy-out. In addition, the smaller SME was created, but it is active in the same sector as Berndorf.