Schloss Oberellenbach, Archaeological site and palace in Mallersdorf-Pfaffenberg, Germany.

Schloss Oberellenbach is a castle complex with archaeological significance in Mallersdorf-Pfaffenberg in Lower Bavaria. The building remains display stonework and foundations from multiple construction phases that are still visible today.

Around 1100 a Pero de Alinpach is recorded gifting censuales to Sankt Emmeram; by 1229/1237 Ellenbach held a ducal Amt and court seat. A Hofmark is documented in the mid-14th century, held by the Armannsperger from 1458 and by the Leoprechting until 1629. Swedish troops attacked the place in 1634. The present three-storey building was probably erected in the early 18th century and was renovated from 2016 to 2019.

The name Oberellenbach is documented from the 14th century, when records began distinguishing Ober- from Unterellenbach; the noble Armannsperger family, listed in the land registers from 1470 to 1580, held the Hofmark. Their successors, the Leoprechting, united the Hofmark with the village of Unterellenbach. A 1721 engraving by Michael Wening shows the castle beside a pond.

Schloss Oberellenbach stands in the Oberellenbach district of Mallersdorf-Pfaffenberg, in the Straubing-Bogen district of Lower Bavaria. The building is a listed monument (Baudenkmal D-2-78-148-19); the grounds are also recorded as a Bodendenkmal (D-2-7239-0247) for medieval and early modern remains, including former outbuildings and gardens. It was restored between 2016 and 2019 in cooperation with the heritage authorities.

The 1721 engraving by Michael Wening shows a plain three-storey building beside a pond, ringed by farm buildings and a low wall. A summer cellar for the brewery lay south-east of the castle. The building was remodelled in 1756, when it gained a brewhouse and courtyard buildings.