Montgomeryshire is a county in Wales, bounded on the north and east by Merionethshire and Denbighshire, on the east by Shropshire, on the south by Radnorshire and Cardiganshire. Its area is 797 square miles.
The county is a region of hills and mountains, with some valleys that have fertile alluvial soil. The principal rivers are the River Severn, the Dovey (whose valley opens out into Cardigan Bay), and the Vyrnwy. There are no large towns. Montgomery is the county town.