刚果王国（1400年－1914年，刚果语：Wene wa Kongo）是位于非洲刚果河河口地区的古代部落联盟。在刚果王国的鼎盛时期，其疆域覆盖了西起大西洋海岸，东至宽果河，北起刚果河，南至宽扎河的广大地区。

葡萄牙人于15世纪后期到达刚果河地区，成为最先与刚果王国进行来往的欧洲民族。与西班牙人在美洲的征服不同，葡萄牙人试图与刚果创建友好的外交关系，并以其作为与刚果内地民族进行交往的媒介。1665年，刚果王安东尼奥一世在与葡萄牙军队的战争中阵亡，刚果王国从此陷入衰落。此后刚果王国名存实亡，分裂为多个互相敌对的公国，其昔日的国土成为葡萄牙人的殖民地。

The Kingdom of Kongo (Kongo: Kongo dya Ntotila or Wene wa Kongo; Portuguese: Reino do Congo) 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.