Radnorshire

thumb|Map of the district of Powys Radnorshire () was one of the thirteen counties of Wales that existed from 1536 until their abolition in 1974, later becoming a district of Powys from 1974 to 1996. It covered a sparsely populated area, and was bounded to the north by Montgomeryshire and Shropshire, to the east by Herefordshire, to the south by Brecknockshire and to the west by Cardiganshire.

The county was formed in 1536 from several Marcher lordships under the Laws in Wales Acts, as part of the formal annexation of Wales into the Kingdom of England by Henry VIII. The county was named after New Radnor, which was the original county town. From 1543 onwards the assizes were held alternately at New Radnor and Presteigne, later settling at Presteigne alone. Presteigne then served as the county's administrative centre until 1889 when Radnorshire County Council was established and chose to base itself in Llandrindod Wells instead.