Louis Alphonse Koyagialo, Congolese politician, Prime Minister of the Democratic Republic of the Congo (born 1947)

Louis Alphonse Daniel Koyagialo Ngbase te Gerengbo was a Congolese politician. He was appointed Deputy Prime Minister of the Democratic Republic of the Congo with responsibility for the Ministry of Postal Services, Telephones, and Telecommunications in the second cabinet of Prime Minister Adolphe Muzito. Following the resignation of Prime Minister Muzito, Koyagialo was Acting Prime Minister from 6 March to 18 April 2012, prior to the appointment of Augustin Matata Ponyo.

The prime minister of the Democratic Republic of the Congo is the head of government of the Democratic Republic of the Congo. The Constitution of the Third Republic grants the prime minister a significant amount of power.