Shires in the context of Worcestershire

A county is a type of officially recognized geographical division within a modern country, federal state, or province. Counties are defined in diverse ways, but they are typically current or former official administrative divisions within systems of local government, and in this sense counties are similar to shires, and typically larger than municipalities. Various non-English terms can be translated as "county" or "shire" in other languages, and in English new terms with less historical connection have been invented such as "council area" and "local government district". On the other hand, in older English-speaking countries the word can still refer to traditional historical regions such as some of those which exist in England, Scotland, Wales, and Ireland. The term is also sometimes used for districts with specific non-governmental purposes such as courts, or land registration.

Historically the concept of a geographical administrative "county" is European (from French: comté, Latin: comitatus), and represented the territorial limits of the jurisdiction of a medieval count, or a viscount (French: vîcomte, Latin: vicecomes) supposedly standing in the place of a count. However, there were no such counts in medieval England, and when the French-speaking Normans took control of England after 1066 they transplanted the French and medieval Latin terms to describe the pre-existing Anglo Saxon shires, but they did not establish any system placing the administration of shires under the control of high-level nobles. Instead, although there were exceptions, the officers responsible for administrative functions, such as tax collection, or the mustering of soldiers, were sheriffs, theoretically assigned by the central government, and controlled directly by the monarch.

Wales in the late Middle Ages spanned the years 1282–1542, beginning with conquest and ending in union. Those years covered the period involving the closure of Welsh medieval royal houses during the late 13th century, and Wales' final ruler of the House of Aberffraw, the Welsh Prince Llywelyn II, also the era of the House of Plantagenet from England, specifically the male line descendants of Geoffrey Plantagenet, Count of Anjou as an ancestor of one of the Angevin kings of England who would go on to form the House of Tudor from England and Wales.

The House of Tudor would go on to create new borders by incorporating Wales into the Kingdom of England by the Laws in Wales Acts 1535–1542, effectively ever since then new shires had been created in place of castles, by changing the geographical borders of the Kingdoms of Wales to create a new definitions for towns and their surrounding lands. Historians referring to the end of the late Middle Ages in Britain often reference the Battle of Bosworth Field involving Henry VII of England, which began a new era in Wales.