Kituba (endonyms: Kituba, Kikongo ya leta) 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.

Kituba is known by many names among its speakers. In academic circles the language is called Kikongo-Kituba.

In the Republic of the Congo it is called Munukutuba, a phrase which means literally "I say", and is used in the Republic's 1992 constitution. The latter (Kituba) means "way of speaking" and is used in the 2015 constitution.

In the Democratic Republic of the Congo it is called Kikongo ya leta ("the state's Kikongo" or "Government Kikongo"), or Kikongo de l'État, shortened to Kileta. Confusingly, it is also called Kikongo, especially in areas that lack Kongo (Kikongo) speakers, namely the Kwango and Kwilu Provinces. The constitution of the Democratic Republic of the Congo lists "Kikongo" as one of the national languages. The Kikongo spoken alongside Lingala in urban centres is in fact Kituba.

There are also other historical names such as Kibula-matadi (literally "the stone-breaker's speech"), (literally "be not", "it isn't so"), Kikwango,, Bastard kikongo and Kizabave (literally "do not know"), but they have largely fallen out of use.

The majority of Kituba speakers live in the Democratic Republic of the Congo. It is spoken as the primary lingua franca in the provinces of Kongo Central, Kwango and Kwilu and to a lesser extent in Kinshasa, Mai-Ndombe and Kasai.

Kituba is spoken in the southern of the Republic of the Congo, in regions of Kouilou, Pointe-Noire, Niari, Bouenza, Lékoumou and in the capital Brazzaville. Lingala is more popular in the north.

Kituba is also spoken in the northern part of Angola, since modern nations cut across the lines of tribal areas and ancient kingdoms, and northern Angola borders the Kwango Province of the Democratic Republic of the Congo which is a strong Kituba-speaking area.