The Sultanate of Yogyakarta, officially the Sultanate of Ngayogyakarta Hadiningrat (Javanese: ꦏꦱꦸꦭ꧀ꦠꦤ꧀ꦤꦤ꧀ꦔꦪꦺꦴꦒꦾꦏꦂꦡꦲꦢꦶꦤꦶꦔꦿꦠ꧀, romanized: Kasultanan Ngayogyakarta Hadiningrat Javanese pronunciation: [ŋajogjɔkartɔ hadinɪŋrat]; Indonesian: Kesultanan Yogyakarta), is a Javanese monarchy in Yogyakarta Special Region, in the Republic of Indonesia. The current head of the sultanate is Hamengkubuwono X.
Yogyakarta existed as a state since 1755 on the territory of modern Indonesia in the central part of Java Island. The sultanate became the main theatre of military operations during the Java War of 1825–1830, following which a significant part of its territory was annexed by the Dutch, and the degree of autonomy was significantly curtailed. In 1946–1948, during the war of independence of Indonesia, the capital of the republic was transferred to the territory of the sultanate, in the city of Yogyakarta.