The Borough of Brecknock (Welsh: Bwrdeistref Brycheiniog) was one of the three local government districts of the county of Powys, Wales from 1974 until 1996.

The borough of Brecknock was created on 1 April 1974 under the Local Government Act 1972.

[1][2] The borough covered the whole area of eight abolished districts and parts of another two:[1] The borough was abolished by the Local Government (Wales) Act 1994, with its functions transferring to Powys County Council on 1 April 1996.

[3] The first election to the council was held in 1973, initially operating as a shadow authority before coming into its powers on 1 April 1974.

[5][6] By 1988 the council had moved to a modern office building called Neuadd Brycheiniog on Cambrian Way in Brecon.