Topic summary
English county

Extracted from the Wikipedia article Counties of England.
Origins
The county of Westmorland was formed in 1227. From then until 1889 there were generally agreed to be 39 counties in England, although there were some liberties such as the Liberty of Ripon which were independent from their host counties for judicial purposes. The Laws in Wales Acts 1535 and 1542 formally absorbed Wales into the kingdom of England and completed its division into 13 counties on the English model. Contemporary lists after that sometimes included Monmouthshire as a 40th English county, on account of its assizes being included in the Oxford circuit rather than one of the Welsh circuits. The 39 historic counties were: