MSF is a secular humanitarian-aid non-governmental organization best known for its projects in war-torn regions and developing countries. Its headquarters are in Geneva, Switzerland.

The organization is known in most of the world by its French name or simply as MSF, but in Canada and the United States the name Doctors Without Borders is commonly used. In 2007 over 26,000, mostly local, doctors, nurses and other medical professionals, logistical experts, water and sanitation engineers and administrators provided medical aid in over 60 countries.

Private donors provide about 80% of the organization's funding, while governmental and corporate donations provide the rest, giving MSF an annual budget of approximately US$400 million.