Yvon Neptune (born November 8, 1946) was the Prime Minister of Haiti from 2002 until 2004. He was appointed by President Jean-Bertrand Aristide, and took office on March 15, 2002. On March 2, 2004, shortly after Aristide's resignation, a mob attempted to arrest Neptune on corruption charges, but it was not successful. A week later, US Marines guarding his residence killed two gunmen there. Neptune was replaced on March 12, 2004, by a provisional government, led by Gérard Latortue, which had been appointed three days earlier. On March 27, 2004, the provisional government banned Neptune from leaving the country, along with 36 other senior officials of the Aristide administration, in order to more easily investigate corruption allegations. As of that date Neptune is in hiding, but he has released a statement calling the ban a "witch hunt."

On February 19, 2005, Neptune was taken into protective custody by United Nations peacekeeping forces and handed back over to Haitian authority during a Port-au-Prince penitentiary breakout.

See also: List of national leaders.