The Kingdom of Kongo (Kongo: Kongo dya Ntotila or Wene wa Kongo; Portuguese: Reino do Congo; now spelled with K to maintain distinction from the present-day Congo nations) was an African kingdom located in west central Africa in what is now northern Angola, Cabinda, the Republic of the Congo, the western portion of the Democratic Republic of the Congo, as well as the southernmost part of Gabon. 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 neighbouring kingdoms, such as Ngoyo, Kakongo, Ndongo and Matamba.
From c. 1390 to 1891 it was mostly an independent state. From 1891 to 1914 it was a vassal state of the Kingdom of Portugal. In 1914, the titular monarchy was forcibly abolished, following Portuguese victory against a Kongo revolt. The remaining territories of the kingdom were assimilated into the colony of Angola. The modern-day Bundu dia Kongo sect favors reviving the kingdom through secession from Angola, the Republic of the Congo, the Democratic Republic of the Congo, and Gabon.
For local currency, the Kingdom of Kongo used cowry shells (Cypraea moneta) called locally nzimbu.