The Sultanate of Yogyakarta is a Javanese monarchy in Yogyakarta Special Region, in the Republic of Indonesia. The current head of the sultanate is Hamengkubuwono X.

The Javanese are an Austronesian ethnic group native to the central and eastern part of the Indonesian island of Java. With more than 100 million people, Javanese people are the largest ethnic group in both Indonesia and in Southeast Asia as a whole. Their native language is Javanese, it is the largest of the Austronesian languages in number of native speakers and also the largest regional language in Southeast Asia. The Javanese as the largest ethnic group in the region have dominated the historical, social, and political landscape in the past as well as in modern Indonesia and Southeast Asia.