The Kingdom of Kongo was a kingdom in Central Africa. It was located in present-day northern Angola, the western portion of the Democratic Republic of the Congo, Southern of Gabon and the Republic of the Congo. At its greatest extent it reached from the Atlantic Ocean in the west to the Kwango River in the east, and from the Congo River in the north to the Kwanza River in the south. The kingdom consisted of several core provinces ruled by the Manikongo, the Portuguese version of the Kongo title Mwene Kongo, meaning "lord or ruler of the Kongo kingdom", but its sphere of influence extended to neighboring kingdoms, such as Ngoyo, Kakongo, Loango, Ndongo, and Matamba, the latter two located in what is Angola today.

Kongo or Kikongo is one of the Bantu languages spoken by the Kongo people living in the Democratic Republic of the Congo (DRC), the Republic of the Congo, Gabon, and Angola. It is a tonal language. The vast majority of present-day speakers live in Africa. There are roughly seven million native speakers of Kongo in the above-named countries. An estimated five million more speakers use it as a second language.