Powys Archives and Family History See what records they have for Breconshire and how to access them. Documents can be viewed in their search room or you can arrange a search via their research service.
Census 1841-1921 There are over 620,000 records from Breconshirein the census, plus the 1939 Register of which there are 46,000+ results.
FreeCen Has a good, but not complete, selection of free records to search and view.
A History of the County of Brecknock Containing the general history, customs, manners, language, sepulchral monuments and inscriptions, natural, curiosities, names and biographies of sheriffs and mayors of Brecknock, also the genealogies and arms of the principal families. Together with the history of every parish, and the names of the patrons and incumbents of all livings.