Kariuki is a surname. Notable people with the surname include:

George Macharia Kariuki, Kenyan politician and MP Gina Din Kariuki (born 1961), Kenyan businesswoman Godffrey Gitahi Kariuki, Kenyan politician Jemimah Kariuki, Kenyan doctor John Ngata Kariuki, Kenyan politician and businessman Josiah Mwangi Kariuki (1929–1975), Kenyan socialist politician during the administration of the Jomo Kenyatta government Julius Kariuki (born 1961), Kenyan athlete Kellen Kariuki, Kenyan accountant and businesswoman Muthui Kariuki (born 1956), Kenyan journalists Patrick Kariuki Muiruri (born 1945), Kenyan politician

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