Legislative districts of Zamboanga Sibugay

The province is currently represented in the lower house of the Congress through its first and second congressional districts.

Prior to gaining separate representation, areas now under the jurisdiction of Zamboanga Sibugay were represented under the Department of Mindanao and Sulu (1917–1935), the historical Zamboanga Province (1935–1953), Region IX (1978–1984) and Zamboanga del Sur (1953–1972; 1984–2001).

8973 on November 7, 2000, and its subsequent ratification by plebiscite on February 22, 2001, separated the entire third district of Zamboanga del Sur to form the new province of Zamboanga Sibugay.

[1] Zamboanga del Sur's former third district automatically became the representation of Zamboanga Sibugay upon its establishment in February 2001, but the new province only elected a representative under its own name beginning in the May 2001 elections.

9360 on October 26, 2006, increased Zamboanga Sibugay's representation by reapportioning the province into two congressional districts,[2] which began to elect their separate representatives in the 2007 elections.