Mbuvi Gideon Kioko, commonly known as Mike Sonko or simply Sonko (Sheng for "rich person" or "boss"), (born 27 February 1975) is a Kenyan politician. He served as the second Governor of Nairobi. He was removed from the office of the governor by a form of impeachement by the Senate of the Republic of Kenya on Abuse of Office, Gross Misconduct and Crimes under National Law on 17 December 2020. He becomes the second governor in Kenya to be impeached after Kiambu's Ferdinand Waititu.