[7] Anthropomorphic urn burials of limestone and some pottery were found in Seminoho Cave[8] dates back to AD 585.

[10] Lebak was once part of Sultanate of Maguindanao.The arrival of Maguindanao which establish the Islamic faith and settled in near the rivers and shores in the 15th century.

By 1696, Captain Rodríguez de Figueroa obtained from the Spanish government the exclusive right to colonize Mindanao.

After obtaining this exclusive right, Captain Rodríguez de Figueroa began an expedition to expand Spanish influence in the region.

However, his efforts met strong resistance from local communities, including the Sultanate of Maguindanao and various indigenous groups.

[12] Spanish rule in the interior of Mindanao remained unstable, with local resistance continuing throughout the colonial period.

The first written history of this town was in 1871, The colonial government of Spain, Lebac was made into a military district of Cotabato.

[19] In 1945, World War II when the combined American and Filipino forces took over the supervision of the Philippine Government against Japanese occupation, Marcelino A. Concha was still the Military Governor of the Empire Province of Cotabato.

[22] and on April 12, 1951, and an executive order 432 issued to transfer the seat of government from Kalamansig to Barrio of Salaman.

[24] The Land Reform Code of Diosdado Macapagal brought more Christian migrants from Luzon and Visayas.

Early February 26, 1973, the hostilities began when a group of fishermen at Tran River was shot and killed.

Signalled the MNLF offensive all over Cotabato raided including Civilian Home Defense Forces (CHDFs), 27th Infantry Battalion, PC Provincial Commands and villages as far as barangay Basak.

[26] Datu Guiwan Mastura withdraws from Lebak and Kalamansig and seeks sanctuary at Palimbang on March 21, 1973.

Offensive military operation started June 6, 1973, under the command of Unified Central Mindanao Command (CEMCOM) Task Force COSMOS under General Fortunato U. Abat who was the commanding general of 3rd Inf Bde (Sep) PA.[27] Units include 21st, the 22nd and the 4th Infantry Battalions PA, the 1st Composite Infantry Battalion, GHQ, the 554th and 531st Philippine Constabulary Companies and four ships of the Naval task Group 71.1, and Composite Air Support Force Cotabato[28][25] July 21, 1973, government troops controlled the Barangay Tran and kept pushing towards Sitio Turugan.

On August 4, 1972, the 22nd Infantry Battalion finally cleared the Sitio Turugan, the Moro National Liberation Front stronghold.

[29] Leader of Tran insurgents Datu Guiwan Mastura together with 12 men surrendered to Ferdinand Marcos in June 1973.

The renaming of Poblacion 2 to barangay Aurelio F. Frieres Sr was approved by the Sanguniang Bayan in its resolution number 007 series of 2002.

Lebak is a coastal town with a total coastline of 19 km (12 mi) long, separated from the mainland of Sultan Kudarat by mountain ranges.

These are the Roman Catholic[citation needed] which accounts for 62% of the total population, Islam, 15%, Protestants, 8% and UCCP, 7%.

Poverty incidence of Lebak Source: Philippine Statistics Authority[46][47][48][49][50][51][52][53] This municipality managed to boost its local economy to its full potential.

[54] The opening of new routes and improvement in transport system are expect to deliver the town into an economic promise.

Strengthen inter-regional trade linkage, gain access to potential agricultural production and will support various economic activities in the adjacent areas.

The 2016, National Competitiveness Council shows that the size of the local economy has total registered business gross sales of Php.

The 105.1 MHz DXLR Radyo Natin of the Manila Broadcasting Company broadcast local news and advertisements with power of 500 Watts Kalamansig-Lebak Cable System, Inc. (KALECA) carries cable television signal to barangay Poblacion, Salaman, Pasandalan, Tibpuan, Barurao 1 & 2, Purikay and far as barangay Pansud.

Several complaints like rude employee including its security guards pretending to be a manager of the power cooperative.

[61] The beautiful beaches stretch 22 kilometers with lined mangroves from Barangay Salaman, Tibpuan and Kinudalan, Taguisa and Datu Karon.

[61] Lebak Katunggan Eco Park at barangay Taguisa is the newly opened tourist attraction in the municipality.

[66] The dedicated 237 hectares for eco-tourism park which includes the beach, rivers, sandbars with developments like 1.6 kilometers of a bamboo boardwalk, forest ranger station, cottages.

The shipping from Port of Cotabato to Lebak by motorboat locally called lantsa (an engine powered small boat) also took 12 hours of travel.

Local transportation includes UV express, motor vehicles, trucks, modified motorcycle (habal-habal or skylab) and even horseback riding are common in some area.