Toastmasters International is a non-profit organization governed by a Board of Directors elected by the membership. The first Toastmasters club was established on October 22, 1924, in Santa Ana, California, by Dr. Ralph C. Smedley, who conceived and developed the idea of helping others to speak more effectively. More clubs were formed, and Toastmasters International was incorporated under California law on December 19, 1932.

Toastmasters International's business and services are administered by its World Headquarters, located in Rancho Santa Margarita, California. It employs no paid promoters or instructors. It has no salaried staff except the Executive Director and World Headquarters staff, who provide services to the clubs and Districts.