Zamboanga Sibugay Province has an approximate total land area of 3,607.8 square kilometres (1,393.0 sq mi). It is geographically located at 7°48’N 122°40’E. To the north it intersects the common municipal boundaries of Kalawit, Tampilisan, and Godad in Zamboanga del Norte. In the west, it is bounded by the municipalities of Siraway, Siocon, Balinguian, and the province of Zamboanga del Norte. On the south it is bordered by Sibuguey Bay. In the east, the municipalities of Bayog and Kumalarang in the province of Zamboanga del Sur bordered it. It is further bordered on the southwest by Zamboanga City.
The climate of the province is moderately normal (climate type III). Annual rainfall varies from 1,599 to 3,500 millimetres (63.0 to 137.8 in). Temperature is relatively warm and constant throughout the year ranging from 22 to 35 °C (72 to 95 °F). The province is situated outside the country's typhoon belt.
In the 2010 local elections, Governor Hofer's daughter, Dulce Ann Hofer, the incumbent Second District Representative, lost the gubernatorial race to Rommel Jalosjos. In the 2013 elections, Dulce Ann Hofer resoundly defeated Romeo Jalosjos, Jr. in the congressional race and former Diplahan mayor Wilter Palma defeated Rommel Jalosjos.
As of the 2010 census, Zamboanga Sibugay has a population of 584,685 people, and a population density of 160/km2. It is ranked 29th among the provinces of the Philippines in terms of both population and population density. The annual population growth rate is 16.09%.
The leading industries are in the areas of semi-processed rubber, rice and corn milling, ordinary food processing, wood and rattan furniture making, dried fish & squid processing, and home-made food processing. New industries include concrete products, garments, wax and candle factories, lime making, and other home and cottage industries.
Major crops produced include rice, corn, coconuts, rubber, fruit trees, vegetables, tobacco, coffee, cacao, and root crops. Livestock and poultry productions are predominantly small-scale and backyard operations. Coal mining in large and small scale and precious metal mining in small scale category are likewise present in some areas of the province.