The United Nations Stabilisation Mission In Haiti (UNSTAMIH) (French: Mission des Nations Unies pour la stabilisation en Haïti), also known as MINUSTAH, an acronym of the French translation, is a United Nations peacekeeping mission in Haiti that has been in operation since 2004. The mission's military component is led by the Brazilian Army and the force commander is Brazilian. MINUSTAH's mandate was most recently extended by United Nations Security Council Resolution 1944 past its October 15, 2010 deadline amid fears of instability. The mission's current mandate runs through October 15th, 2011 with the intention of further renewal. The force is composed of 8,940 military personnel and 3,711 police, supported by an international civilian personnel, a local civilian staff and United Nations Volunteers.

Following the 2010 Haiti earthquake, the United Nations reported that the headquarters of the mission in Port-au-Prince had collapsed and that the mission's chief, Hédi Annabi of Tunisia, his deputy Luiz Carlos da Costa of Brazil, and the acting police commissioner, the Royal Canadian Mounted Police's Doug Coates of Canada, were confirmed dead. On 14 January 2010, UN headquarters dispatched the former head of MINUSTAH and current Assistant Secretary-General for Peacekeeping Operations, Edmond Mulet, as the organisation's Acting Special Representative of the Secretary-General and interim head of MINUSTAH. Mulet clarified on January 22 that MINUSTAH will concentrate on assisting the Haitian National Police in providing security within the country after the earthquake, while American and Canadian military forces will distribute humanitarian aid and provide security for aid distribution.