Hi Derek
GENUK is a great site for details
http://www.fhsc.org.uk/genuki/reg/rad.htm#knigKnighton
Created 1st July 1837. Mainly in Radnorshire, but included parts of Herefordshire and Shropshire.
Sub-districts : Knighton; Llanbister; Presteigne.
GRO volumes : XXVI (1837-51); 11b (1852-1930).
Blethvaugh (Bleddfa), Discoed (from 1876), Heyop, Knighton, Llanamo, Llanbadarn-Fynfydd, Llanbister, Llandewy-Ystradenny, Llanfihangel-Beguildy, Llanfihangel-Rhydithon, Lower Llangynllo, Norton (from 1876), Pilleth (from 1876), Presteigne (from 1876), Stanage, Upper Llangynllo, Whitton (from 1876).
Registers now divided between Radnorshire East, Mid Powys, Leominster and Clun districts.
Cheers
Keith
Where are they in 1861 census?