Klein-Pöchlarn is a town in the district of Melk, in the Austrian state of Lower Austria. It lies in the eastern part of Austria, within the federal province of Lower Austria, whose capital is St. Pölten. The town belongs to the Melk district, one of the administrative subdivisions of the state.
The settlement is situated in the Danube valley region of Lower Austria, an area known for its river landscape and its position along historic routes through the province. Its name distinguishes it from the neighbouring town of Pöchlarn, which lies nearby along the same stretch of the Danube.
As a small municipality in the Melk district, Klein-Pöchlarn forms part of the rural and semi-rural fabric of the region, which is characterised by a mix of agricultural land, small towns, and connections to the larger urban centres of Lower Austria. The town shares in the administrative structures common to Austrian municipalities within the district of Melk.