Hamengkubuwono IX, Indonesian politician, 2nd Vice President of Indonesia (died 1988)

Sri Sultan Hamengkubuwono IX, often abbreviated as HB IX, was an Indonesian politician and Javanese royal who was the second vice president of Indonesia, the ninth sultan of Yogyakarta, and the first governor of the Special Region of Yogyakarta. Hamengkubuwono IX was also the chairman of the first National Scout Movement Quarter and was known as the Father of the Indonesian Scouts.

The vice president of the Republic of Indonesia is the second-highest officer in the executive branch of the Indonesian government, after the president, and ranks first in the presidential line of succession. Since 2004, the president and vice president are directly elected to a five-year term as a single ticket.