|Regions with significant populations|
The Bunda people or (also Ambuun, Mbuun) in the Democratic Republic of the Congo are an ethnic group that mostly live in Idiofa Territory, Kwilu District of Bandundu Province. They speak the Mpuono language, spoken by an estimated 165,000 people as of 1972. 
The Belgian colonial administration originally gave Idiofa Territory the name of "Babunda Territory" after the Bunda people, who formed the majority of the population.  They are still the most important group in the center of Idiofa territory.  The Bunda are the majority of the population of the administrative center of Idiofa.  There are also Bunda populations in Bulungu Territory and Gungu Territory. 
The Bundu territory has a tropical climate with alternating dry and rainy seasons. The region has abundant water resources, the most important rivers being the Lubwe, Loange, Kamtsha and the Piopio. Precipitation in the rainy season is so intense that it is a major obstacle to farming and a time when food may be scarce. Hunting and fishing are individual activities during this period. Food is abundant in the dry season, the main season for communal hunting and fishing. 
Bandundu is one of eleven former provinces of the Democratic Republic of the Congo. It bordered the provinces of Kinshasa and Bas-Congo to the west, Équateur to the north, and Kasai-Occidental to the east. The provincial capital is also called Bandundu.
The Kwilu River is a major river in the Kwilu Province formerly known as Bandundu province in the Democratic Republic of the Congo (DRC) to the city of Bandundu, where it joins the Kwango River just before this stream enters the Kasai River. In the DRC the river flows past the towns of Gungu, Kikwit, Bulungu, Bagata, Rutherfordia and Bandundu. Lusanga, formerly Leverville, lies at the location where the Kwenge River joins the Kwilu, between Kikwit and Bulungu.
Bandundu, formerly known as Banningville or Banningstad, is the capital city of Kwilu Province of the Democratic Republic of the Congo.
The Democratic Republic of the Congo is a multilingual country where an estimated total of 242 languages are spoken. Ethnologue lists 215 living languages. The official language, inherited from the colonial period, is French. Four indigenous languages have the status of national language: Kikongo ya leta, Lingala, Swahili and Tshiluba.
Kituba is a widely used lingua franca in Central Africa. It is a creole language based on Kikongo, a Bantu language. It is a national language in Republic of the Congo and Democratic Republic of the Congo.
Idiofa is a town in Kwilu Province of the Democratic Republic of the Congo.
Mass media in the Democratic Republic of the Congo are both nationally and internationally state owned and operated.
Lulua District was a district of the Belgian Congo and the Democratic Republic of the Congo. The city of Kananga was at the center of the district, but had a separate administration. In 2015 Lulua District became the province of Kasaï-Central.
Kwango is one of the 21 new provinces of the Democratic Republic of the Congo created in the 2015 repartitioning. Kwango, Kwilu, and Mai-Ndombe provinces are the result of the dismemberment of the former Bandundu province. Kwango was formed from the Kwango district whose town of Kenge was elevated to capital city of the new province.
Kwilu is one of the 21 new provinces of the Democratic Republic of the Congo created in the 2015 repartitioning. Kwilu, Kwango, and Mai-Ndombe provinces are the result of the dismemberment of the former Bandundu province. Kwilu was formed from the Kwilu district and the independently administered cities of Bandundu and Kikwit. Bandundu retained its status as a provincial capital.
Mai-Ndombe District was a district of pre-2015 Bandundu Province in the Democratic Republic of the Congo. It covered roughly the same area as the colonial-era Lac Léopold II District. In 2015, it was merged with Plateaux District, all in pre-2015 Bandundu Province, to form the new Mai-Ndombe Province.
Idiofa Territory is an administrative area in the Kwilu Province of the Democratic Republic of the Congo. The capital is the town of Idiofa.
Dibaya-Lubwe is a town in the Kwilu Province of the Democratic Republic of the Congo. It is in Idiofa Territory. The town lies on the south shore of the Kasai River just below the point where it is joined by the Lubue River. As of 2012 the population was estimated to be 38,933.
The Kamtsha River is a tributary of the Kasai River. The river flows north through Idiofa territory of Kwilu province, Democratic Republic of the Congo to its mouth on the Kasai River.
The Lubue River runs from south to north through Idiofa territory, Kwilu province, Democratic Republic of the Congo. Near its origin in the south, where the Musanga River enters from the left, it is a small, winding river perhaps 12 metres (39 ft) wide obstructed by rocks and rapids. It becomes navigable at Mulasa, and below this point meanders through a very wide and wooded valley. It enters the Kasai near the town of Dibaya Lubue.
The Luele River runs from south to north through Idiofa territory, Kwilu province, Democratic Republic of the Congo. The river starts as a clear stream in a small valley near Idiofa. It grows in size rapidly due to many small tributaries, among which is the Punkulu River, and then meanders through a large valley before entering the Kasai River downstream from Mangai.
Eolo is a community in Idiofa Territory, in the Kwilu Province of the Democratic Republic of the Congo. It lies on the south shore of the Kasai River just downstream from the mouth of the Kamtsha River.
Kwilu District was a district of the Belgian Congo and the Democratic Republic of the Congo. It roughly corresponded to the present province of Kwilu.
Congo-Kasaï was one of the four large provinces of the Belgian Congo defined in 1914. It was formally established in 1919, and in 1933 was divided into the new provinces of Léopoldville and Lusambo.
The Bayanzi are an ethnic group in the Democratic Republic of the Congo who live in the southwest of the country and number about one million. They are probably a sub-group of the Kongo people, and speak a Bantu language. The largest political unit is the chieftainship, of which there are about 120. The Bayanzi are matrilineal, so a child belongs to the clan of the mother. The Belgian colonists first encountered them at Bolobo on the Congo River, as traders up and down the river. They employed them from 1883. Later the Bayanzi were forced to labor on the palm oil plantations.