Municipality of Sergio Osmeņa Sr. is one of the 25 municipalities
comprising the Province of Zamboanga del Norte. She was created by virtue
of Republic Act No. 3697 dated September 14, 1963.
The municipality was carved out of the municipality of Piņan. The
barangays that originally comprise the new municipality were Sibulan,
Dampalan, Labag, princesa Lamaya and Marapong. Barangay Sibulan was the
seat of the new municipal government.
The first appointed municipal mayor was Hon.
Lorenzo Collera, a former official of the Philippine Constabulary. He was
the first and only appointed Municipal Mayor of the town. In 1964
Bienvenido Andilab was elected Municipal Mayor. He served for 20 years
until his untimely death on May 4, 1984. Hon. Benjamin D. Butanas, his
Vice-Mayor succeeded and served the seat until EDSA Revolution in February
1986. Dr. Rudy A. Clamohoy acted as mayor-designate up to his appointment
on January 18, 1988.
Then on May 11, 1998, the municipality elected new set of officials to administer the local government unit. These officials were overwhelmingly favored due to their utmost dedication for the development of the municipality as well as in serving the municipal constituents.