A prefecture (from the Latin word, "praefectura") is an administrative jurisdiction traditionally governed by an appointed prefect. This can be a regional or local government subdivision in various countries, or a subdivision in certain international church structures. During the antiquity, it was the name of a type of Roman district. In the 21st century, the term prefecture is used for the modern first-level subdivisions of the Central African Republic, Japan, and Morocco.

Prefecture originally refers to a self-governing body or area in the Roman Empire since the tetrarchy, when Emperor Diocletian divided the Empire into four districts (each further divided into dioceses), grouped under a Vicarius (a number of Roman provinces, listed under that article). Diocletian also maintained two pretorian prefectures as an administrative level above the dioceses (a few of which were split).

As Catholic canon law is strongly inspired by Roman law, it is not surprising that the Catholic Church has several offices under a prefect. That term occurs also in otherwise styled offices, such as the head of a congregation or department of the Roman Curia. Various ecclesiastical areas, too small for a diocese, are termed prefects.

In Brazil, the prefecture (prefeitura or prefeitura municipal in Portuguese) is the executive branch of the government of each Brazilian municipality (município in Portuguese). The term also refers to the office of the mayor (prefeito in Portuguese).

The Central African Republic is divided into twenty prefectures.^[1]

From 1836 until 2011, modern Greece was divided into nomoi (Greek: νομοί, singular νομός, nomos) which formed the country's main administrative units. These are most commonly translated into English as "prefectures" or "counties".

Each nomos was headed by a prefect (νομάρχης, nomarches), who was a ministerial appointee until ca. 1990, but was then elected by direct popular vote in a process of decentralization that saw the prefectures become local government units. Municipal elections in Greece are held every four years and voting for the election of prefects and mayors was carried out concurrently but with separate ballots.

The 2010 Kallikratis plan, which took effect on 1 January 2011, abolished the prefectures as separate administrative units, and transformed them into regional units within the country's thirteen administrative regions.

Xian (縣)

When used in the context of Chinese history, especially China before the Tang dynasty, the word "prefecture" is used to translate xian (縣). This unit of administration is translated as "county" when used in a contemporary context, because of the increase of the number of "xian" and the decrease of their sizes over time in the Chinese history.

Zhou (州) or Fu (府)

In the context of Chinese history during or after the Tang dynasty, the word "prefecture" is used to translate zhou (Wade–Giles chou (州), another ancient unit of administration in China, equivalent to the modern province.

In modern-day China, the prefecture (地区; pinyin: dìqū) is an administrative division found in the second level of the administrative hierarchy. In addition to prefectures, this level also includes autonomous prefectures, leagues, and prefecture-level cities. The prefecture level comes under the province level, and in turn oversees the county level.

In Italy a prefettura is the office of a prefetto, the representative of the Government in each province.

In France, a préfecture is the capital city of a department, and by metonymy also designates the office and residence of the prefect. As there are 101 departments in France, there are 101 prefectures. A préfecture de région is the capital city of an administrative region. This is the city where the prefect - the appointed government representative - resides.

In English, "prefecture" is used as the translation for todōfuken (都道府県), which are the main subdivisions of Japan. They consist of 43 prefectures (県 ken) proper, two urban prefectures (府 fu, Osaka and Kyoto), one "circuit" or "territory" (道 dō, Hokkaido) and one "metropolis" (都 to, Tokyo). Before the end of World War II, the word was also used for overseas areas 庁 (chō)、州 (shu) and 道 (dō, in Korea).

Until 1894 Hyeon (Korean: 현; Hanja: 縣) was the lowest level administrative division in Korea and can be translated into "Petty Prefecture" in the modern sense. It was below Gun (군, 郡; "county") in the administrative hierarchy.

Dohobu (도호부; 都護府) was a higher level administrative division and can be translated into "Protectorate General", "Greater Prefecture", "Metropolitan Prefecture", or "Martial Prefecture" in the modern sense. The capital, Hanyang (Seoul), can sometimes be translated as "Hanseong Prefecture".

In 1895, Hyeon and Dohobu divisions were abolished. From 1910 to 1949, the term "prefecture" was used to translate Bu (부; 府). Since 1949 neither Hyeon nor Bu have been used, and there has been no division in either the South Korean or North Korean administrative system which translates as "prefecture".

Mongolian prefectures (Aimags) were adopted during Qing dynasty's rule. Today these are usually translated as "provinces".

In Morocco, the 75 second-level administrative subdivisions are 13 prefectures and 62 provinces. They are subdivisions of the 12 regions of Morocco. Each prefecture and province are subdivided in their turn into districts (cercles, sing. cercle), municipalities (communes, sing. commune) or urban municipalities (communes urbaines, sing. commune urbaine), and arrondissements in some metropolitan areas.

Traditionally, the term prefecture referred to a City Hall and the prefect was the equivalent of a mayor and commissioner. After recent changes, the prefectures and prefects are analogous with the figure of Town Clerk.

• Apostolic prefecture
• County
• Prefectures of China
• Politics of the People's Republic of China
• Prefectures of Japan
• Politics of Japan
• Politics of the Republic of China
• Politics of Mongolia
• Province
• Subprefecture