A province is a territorial unit, almost always an administrative division.

Roman provinces

main: Roman province The word is attested in English since c.1330, deriving from Old French province (13th c.), which comes from the Roman word provincia, which referred to the sphere of activity which a magistrate was assigned to exercise his authority; hence, in particular, a foreign territory.

A possible origin in Latin is from pro- ("on behalf of") and vincere ("to triumph/take control over"). Thus a province is a territory or function that a Roman magistrate took control of on behalf of his government. However this does not tally with the even earlier Latin usage as a generic term for a jurisdiction under Roman law.

The Roman Empire was divided into provinces (provinciae).

Provinces in modern countries

In many countries, a province is a relatively small non-constituent level of sub-national government (similar to a county in many English-speaking countries). In others it is an autonomous level of government and constituent part of a federation or confederation, often with a large area (similar to a US state). In France and China, province is a sub-national region within a unitary state. This means the province can be abolished or created by the central government.

For instance, a province is a local unit of government in Philippines, Belgium, Spain and Italy, and a large constituent autonomous area in Canada, Congo and Argentina. In Italy and Chile a province is an administrative sub-division of a region, which is the first order administrative sub-division of the state. Italian provinces consist of several administrative sub-divisions called comune (communes). In Chile they are referred to as comunas

In the United Kingdom, a province is any county outside Greater London, and hence "the provinces" are everywhere except Greater London.

The "Province of Northern Ireland" is a British territory that is specifically referred to as a "province". In this case, the title, "province" suggests separateness along the lines of Canadian usage. The title "province" above all reflects Northern Ireland's unique autonomy within the UK immediately after its foundation in 1921, but today Northern Ireland varies between a devolved government and direct rule. The term province may also suggest at Ulster, the northern most province of Ireland, six counties of which are Northern Ireland and are in the United Kingdom. Northern Ireland is also known as a constituent country of the United Kingdom, and is called "a country within a country" by the UK government.

Various overseas parts of the British Empire had the colonial title of Province (in a more Roman sense), such as the Province of Canada and the Province of South Australia (the latter to distinguish it from the penal 'colonies' elsewhere in Australia). Equally, for instance, Mozambique was a "province" as a Portuguese colony.