Rattenberg is a municipality located in the district of Straubing-Bogen in Bavaria, Germany. It is situated in the eastern part of Bavaria, within a region known for its Danube River landscape and agricultural character.
As a small municipality in this rural Bavarian district, Rattenberg is part of the Lower Bavaria (Niederbayern) area. The Straubing-Bogen district is named after the nearby city of Straubing and the Bogen region, reflecting the local geography and administrative divisions of the area.