District of Radnorshire
|- 1974||301,165 acres (1,218.77 km2)|
|- Succeeded by||Powys|
|- HQ||Llandrindod Wells|
The district was formed as Radnor on 1 April 1974 as part of a general reorganisation of local government in England and Wales under the Local Government Act 1972. The new district replaced eight local authorities:
- The urban districts of Knighton, Llandrindod Wells and Presteigne
- The rural districts of Colwyn, Knighton, New Radnor, Painscastle and Rhayader.
On 8 May 1989 the district was renamed Radnorshire by resolution of the district council.
On 1 April 1996 the two-tier system of councils introduced in Wales in 1974 was replaced, and the country was divided into twenty-two counties and county boroughs by the Local Government (Wales) Act 1994. Accordingly, the district was abolished, with its area passing to the county of Powys.
- Local government in England and Wales: A Guide to the New System. London: HMSO. 1974. p. 107. ISBN 0117508470.
- OPCS Key Population and Vital Statistics 1992
- Schedule 4: Local government areas in Wales, Local Government Act 1972 (c.70)
- The London Gazette: . 10 May 1989.
- "Schedule I: The New Principal Areas". Local Government (Wales) Act 1994 (c. 19). Office of Public Sector Information. 1994. Retrieved 2009-01-30.