Principal council in the context of Civil parishes

In England, a civil parish is a type of administrative parish used for local government. It is a territorial designation which is the lowest tier of local government. Civil parishes can trace their origin to the ancient system of parishes, which for centuries were the principal unit of secular and religious administration in most of England and Wales. Civil and religious parishes were formally split into two types in the 19th century and are now entirely separate. Civil parishes in their modern form came into being through the Local Government Act 1894 (56 & 57 Vict. c. 73), which established elected parish councils to take on the secular functions of the parish vestry.

A civil parish can range in size from a sparsely populated rural area with fewer than a hundred inhabitants, to a large town with a population in excess of 100,000. This scope is similar to that of municipalities in continental Europe, such as the communes of France. However, unlike their continental European counterparts, parish councils are not principal authorities, and in most cases have a relatively minor role in local government.

The wards and electoral divisions in the United Kingdom are electoral districts at sub-national level, represented by one or more councillors. The ward is the primary unit of English electoral geography for civil parishes and borough and district councils, the electoral ward is the unit used by Welsh principal councils, while the electoral division is the unit used by English county councils and some unitary authorities. Each ward/division has an average electorate of about 5,500 people, but ward population counts can vary substantially. As of 2021 there are 8,694 electoral wards/divisions in the UK. An average area of wards or electoral divisions in the United Kingdom is 28.109 km (10.853 sq mi).

The principal areas of Wales, comprising the counties and county boroughs of Wales, are a form of subdivision in Wales. There are currently 22 principal areas in Wales, and they were established in 1996. They are a single-tier form of local government, each governed by a principal council. They replaced the previous two-tier system of eight counties and 37 districts that were in place in Wales from 1974 to 1996.

In England and Wales local government legislation, a principal area is one of the sub-national areas established for control by a principal council. They include most of the areas governed by the lowest level of local government above that of Parish or Community council.

Local government in Wales is primarily undertaken by the twenty-two principal councils. The councils are unitary authorities, meaning they are responsible for providing local government services within their principal area, including education, social work, environmental protection, and most highway maintenance. The principal areas are divided into communities, most of which have an elected community council. The services provided by community councils vary, but they will typically maintain public spaces and facilities. Local councils in Wales are elected; the most recent local elections in Wales took place in 2022, and the next are due to take place in 2027.