Zamboanga del Norte, officially the Province of Zamboanga del Norte, is a province in the Philippines situated within the Zamboanga Peninsula region in Mindanao. Its capital is Dipolog and the province borders Zamboanga del Sur and Zamboanga Sibugay to the south, Misamis Occidental to the east, and the Sulu Sea to the west.
Zamboanga del Norte is the largest province of the Zamboanga Peninsula region by land area covering 7,301.00 square kilometres (2,818.93 sq mi). Zamboanga del Norte is the 26th populous province in the Philippines.
Prior to its creation as a province, Zamboanga del Norte formed the northern portion of the historical province of Zamboanga.
The early history of Zamboanga del Norte is shared with that of Zamboanga City, which had been the center of the entire Mindanao area, most notably during the American era. When Zamboanga City became a chartered city on October 12, 1936, it encompassed the southern tip of the Zamboanga Peninsula and the island of Basilan, making it the largest city in the world in terms of land area.
Through Republic Act No. 711 issued on June 6, 1952, Zamboanga province was divided into two independent provinces, which included Zamboanga del Sur.
Zamboanga del Norte was the site of at least one major assassination during the Marcos Martial law era - the gunning down of Human Rights lawyers Jacobo Amatong and Zorro Aguilar by two soldiers of the Marcos government, who were never caught. Both lawyers have since been honored by having their names inscribed on the wall of remembrance at the Philippines’ Bantayog ng mga Bayani, which honors the heroes and martyrs who fought against Ferdinand Marcos and his martial law regime.