Burg Schmitthof, Medieval castle in Lehrbach, Germany.

Burg Schmitthof is a fortified estate with a residential building and thick surrounding walls located near Lehrbach. The structure preserves three of its original four corner towers and shows traces of a former moat system.

The site lies on the deserted village of Reisdorf, first recorded around 1300 as "Reyssdorff" and abandoned by 1427. Around 1538 Georg Freiherr Schenck zu Schweinsberg built the water castle here for a branch of the Schenck zu Schweinsberg family. A 1543 record notes that Reisdorf was now called "Schmitt hievor Reistorff". In 1787 the castle was the sole property of the Freiherr Schenk von Schweinsberg under the Eußergericht in Amt Kirtorf, and it was renewed several times in the 17th and 19th centuries.

The castle displays medieval defensive building techniques with its thick walls and corner towers still visible today. Visitors can see how water-based protection once worked through the remnants of the surrounding moat system.

The estate lies northwest of Lehrbach in the municipality of Kirtorf. It remains in private ownership, so exterior access is limited, but the outer structures are visible from the surrounding area.

The three surviving corner towers have a lower storey of rubble stone pierced by arrow slits and an upper storey of timber framing two bays high. The fourth tower is gone, leaving the enclosing wall open toward the northeast.