Zamboanga Sibugay is a province

Provinces of the Philippines

The Provinces of the Philippines are the primary political and administrative divisions of the Philippines. There are 80 provinces at present, further subdivided into component cities and municipalities. The National Capital Region, as well as independent cities, are autonomous from any provincial...

 of the Philippines

Philippines

The Philippines , officially known as the Republic of the Philippines , is a country in Southeast Asia in the western Pacific Ocean. To its north across the Luzon Strait lies Taiwan. West across the South China Sea sits Vietnam...

 located in the Zamboanga Peninsula

Zamboanga Peninsula

Zamboanga Peninsula / Western Mindanao is a peninsula and an administrative region in the Philippines. Designated as Region IX, the region consists of three provinces, namely, Zamboanga del Norte, Zamboanga del Sur, and Zamboanga Sibugay, its component cities of Dipolog, Dapitan, Pagadian, and...

 region

Regions of the Philippines

In the Philippines, regions are administrative divisions that serve primarily to organize the provinces of the country for administrative convenience. Currently, the archipelagic republic of the Philippines is divided into 17 regions...

 in Mindanao

Mindanao

Mindanao is the second largest and easternmost island in the Philippines. It is also the name of one of the three island groups in the country, which consists of the island of Mindanao and smaller surrounding islands. The other two are Luzon and the Visayas. The island of Mindanao is called The...

. Its capital is Ipil

Ipil, Zamboanga Sibugay

Ipil is a 1st class municipality in the province of Zamboanga Sibugay, Philippines. It is the capital municipality of Zamboanga Sibugay...

 and it borders Zamboanga del Norte

Zamboanga del Norte

Zamboanga del Norte or simply known as ZANORTE is a province of the Philippines located in the Zamboanga Peninsula region in Mindanao. Its capital is Dipolog City and the province borders Zamboanga del Sur and Zamboanga Sibugay to the south and Misamis Occidental to the east...

 to the north, Zamboanga del Sur

Zamboanga del Sur

Zamboanga del Sur is a province of the Philippines located in the Zamboanga Peninsula region in Mindanao. Pagadian City is the capital...

 to the east and Zamboanga City

Zamboanga City

The City of Zamboanga : is a highly urbanized, independent and a chartered city located in Mindanao, Philippines....

 to the southwest. To the south lies Sibuguey Bay

Sibuguey Bay

Sibuguey Bay is a large bay in the southwestern part of Mindanao island, Philippines, at ....

 in the Moro Gulf

Moro Gulf

The Moro Gulf is a sea in Mindanao in the Philippines. It is part of Celebes Sea and is surrounded by the Zamboanga Peninsula and the central part of Mindanao. Sibuguey Bay and Illana Bay are its major branches. Zamboanga City is the most important port city on its coast...

. Zamboanga Sibugay was created in 2001 when the third district of Zamboanga del Sur was carved out of that province. Zamboanga Sibugay is the 79th province created in the Philippines.
As of the 2000 census

Census

A census is the procedure of systematically acquiring and recording information about the members of a given population. It is a regularly occurring and official count of a particular population. The term is used mostly in connection with national population and housing censuses; other common...

, Zamboanga Sibugay has a population of 497,239 people, and a population density of 161/km².