Schloss Guntersdorf, Medieval castle in Guntersdorf, Austria.

Schloss Guntersdorf, also called Schloss Ludwigstorff, stands in Guntersdorf near Hollabrunn in Lower Austria. In the second half of the 16th century a late-medieval building complex was enlarged into an extended complex with a moat. The castle, a listed monument, was badly damaged and looted in the Second World War.

Guntersdorf was held by Melk Abbey and then the Ruckendorffer family; Ulrich von Ruckendorff pledged a share of the house in 1295 to Eberhard IV von Walsee, enfeoffed with the lordship in 1317. The Wallseer held it until 1476, followed by the Rogendorfer, and in 1546 Johann Freiherr von Weißpriach acquired lordship and castle. In the second half of the 16th century a late medieval complex was enlarged into an extensive moated layout; the Protestant Teuffel family sold it in 1684 to Johann Karl von Serenyi.

The name Ludwigstorff, used for the castle since 1717, comes from Johann Rudolf Freiherr von Ludwigsdorf, who bought the estate from Karl Anton Graf Serenyi for 236,000 gulden. The family still owns the castle and its estate, which comprises about 280 hectares of fields and twenty hectares of forest. Dominik Ludwigstorff took over the castle and estate management in 1990.

The castle and its grounds can be rented for events, so access may be restricted when a function is taking place; check with the estate administration in advance. The site lies at about 247 metres above sea level in the rolling countryside around Guntersdorf, roughly 11 km from Hollabrunn and 50 km north of Vienna.

The estate passed to the Ludwigstorff family in 1717, when Karl Anton Count Serenyi sold the lordship of Guntersdorf to Johann Rudolf Freiherr von Ludwigsdorf for 236,000 gulden; the family still owns it, and Dominik Ludwigstorff took over the castle and estate management in 1990. The property includes about 280 hectares of farmland and twenty hectares of forest.