Rotary is an organization of business and professional leaders united worldwide who provide humanitarian service, encourage high ethical standards in all vocations, and help build goodwill and peace in the world. In more than 160 countries worldwide, approximately 1.2 million Rotarians belong to more than 29,000 Rotary clubs.

The world's first service club, the Rotary Club of Chicago, Illinois, USA, was formed on 23 February 1905 by Paul P. Harris, an attorney who wished to recapture in a professional club the same friendly spirit he had felt in the small towns of his youth. The name "Rotary" derived from the early practice of rotating meetings among members' offices.

As it approached the dawn of the 21st century, Rotary worked to meet the changing needs of society, expanding its service effort to address such pressing issues as environmental degradation, illiteracy, world hunger, and children at risk. The organization admitted women for the first time in 1989 and claims more than 90,000 women in its ranks today. Following the collapse of the Berlin Wall and the dissolution of the Soviet Union, Rotary clubs were formed or re-established throughout Central and Eastern Europe. Today, 1.2 million Rotarians belong to some 29,000 Rotary clubs in more than 160 countries.