[3] Once a swampy area surrounded by the second-growth forest, Sulop was inhabited by the natives of the Tagacaolo, B’laan, and Bagobo tribes.

The means of survival of these indigenous people were hunting wild boars and agriculture, the main product of which was corn.

Several persons, particularly Eulalio Masocol, Zoilo Comabig, and Antonio Go Pace emerged as respected figures of the community.

During those days, the people would converge every Tuesday to a place they fondly called LOTE for their marketing, the common marketplace located near the residence of spouses Agripina and Segundo Lumbab beside the Sulop Elementary School.

The mode of transportation then was the horse-drawn “tartanilya” or “calesa” and the carabao and cow drawn “caromata” or “cariton”.

With funds provided by then-Governor Alejandro Almendras, a lot was purchased where the first catholic church was built.

After its creation, the first set of municipal officials were appointed by President Garcia with Nestorio Comabig as mayor.

However, Mayor Nestorio Comabig resigned from office six (6) months after he assumed office; The then Vice Mayor Antonio Go Pace assumed the vacated mayorship position and facilitated the construction of the first Town Hall of the municipality; Vice-mayor Sebastian Mondejar, Sr. succeeded the mayorship of Antonio Go Pace when the latter died and then facilitated the establishment of the Cacao Investors Incorporated (CII), a multi-million-peso corporation engaged in cacao beans production; Vice-mayor Perfecto O. Sagarino, Sr. succeeded as mayor when Mayor Sebastian Mondejar, Sr. was killed in an ambush on December 3, 1982 during the height of the insurgency.

Mayor Jose Jimmy S. Sagarino then initiated the formulation of the vision of Sulop and the 1995 – 2005 Comprehensive Development Plan of the municipality.

In his quest to sustain the obtaining momentum of development, he placed agricultural productivity as the centerpiece of his development thrusts and initiated the construction of Labon – Clib Steel Bridge; Another change in leadership took place on June 30, 2007, when the newly elected mayor assumed the post at noon marking the return of Mayor Jose Jimmy S. Sagarino who, in his new term as local chief executive, celebrated the Golden Founding Anniversary of the Municipality of Sulop.

A new era in the local political leadership transpired when the first lady Chief Executive assumed the highest position of the municipality with the assumption of Honorable Maria S. Sagarino as the new mayor on June 30, 2016.

Sulop is about 17 kilometres (11 mi) from Digos, the seat of the provincial government of Davao del Sur.