Eichgraben is a town in the district of Sankt Pölten-Land, in the Austrian state of Lower Austria. It lies in the eastern part of the state, within the Vienna Woods (Wienerwald) region west of Vienna.
The town is a member of the Wienerwald Biosphere Reserve, a UNESCO-designated area, and is known for its wooded surroundings and proximity to the Wienerwaldsee reservoir. It is connected to Vienna and St. Pölten by the Westbahn railway line.