Brecknock was a rural district in the administrative county of Breconshire, Wales, from 1894 - 1974.
The district surrounded, but did not include, the town of Brecon, which was a separate municipal borough.
Under the Local Government Act 1972, Brecknock Rural District was abolished and its area was combined with a number of other local government areas to form the Borough of Brecknock, one of three districts of the new county of Powys.
Brecknock Rural District comprised the following civil parishes.
[1] They are listed below using the spelling current at the times of the rural district's existence: