Yahya Ould Ahmed El Waghef (; born 1960) is a Mauritanian politician. He was appointed as Prime Minister of Mauritania on 6 May 2008, serving until the August 2008 coup d'état. Waghef is also President of the National Pact for Democracy and Development (ADIL), and he was Secretary-General of the Presidency from 2007 to 2008.