is a

district A district is a type of administrative division that, in some countries, is managed by the local government. Across the world, areas known as "districts" vary greatly in size, spanning regions or counties, several municipalities, subdivisions o ...

located in

Okayama Prefecture is a Prefectures of Japan, prefecture of Japan located in the Chūgoku region of Honshu. Okayama Prefecture has a population of 1,906,464 (1 February 2018) and has a geographic area of 7,114 Square kilometre, km2 (2,746 sq mi). Okayama Prefectur ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. As of 2003, the district has an estimated

population Population typically refers to the number of people in a single area, whether it be a city or town, region, country, continent, or the world. Governments typically quantify the size of the resident population within their jurisdiction using a ...

of 31,845 and a

density Density (volumetric mass density or specific mass) is the substance's mass per unit of volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' can also be used. Mathematical ...

of 79.65 persons per km². The total area is 399.83 km².

Towns and villages

Aida District consists of the following village: *

Nishiawakura is a List of villages in Japan, village located in Aida District, Okayama, Aida District, Okayama Prefecture, Japan. As of October 2016, the village has an estimated population of 1,437 and a population density, density of 25 persons per km². T ...

History

Prior to March 31, 2005, Aida District included *

Aida ''Aida'' (or ''Aïda'', ) is an opera in four acts by Giuseppe Verdi to an Italian libretto by Antonio Ghislanzoni. Set in the Old Kingdom of Egypt, it was commissioned by Cairo's Khedivial Opera House and had its première there on 24 December ...

* Higashiawakura * Mimasaka *

* Ōhara * Sakutō On that date, all but Nishiawakura merged to form the new city of Mimasaka. Districts in Okayama Prefecture Articles lacking sources from June 2009 All articles lacking sources {{Okayama-geo-stub