South Cotabato, officially the Province of South Cotabato, is a province in the Philippines located in the Soccsksargen region in Mindanao. Its capital is Koronadal, and it borders Sultan Kudarat to the north and west, Sarangani to the south and northeast, and Davao del Sur to the far northeast. To the southeast lies Sarangani Bay.
General Santos, located on the shores of Sarangani Bay, is the most populous city in both the province and the region, but is governed independently from the province. The province of Sarangani used to be part of South Cotabato until it was made an independent province in 1992.
Centuries ago, the area that would be the South Cotabato was sparsely inhabited by Maguindanaon pioneers and Lumads which are under Sultanate of Maguindanao's influence. The Spaniards launched expeditions to subdue the area throughout the colonial era but they never gained control of the region until the middle of the 19th century after the Spaniards established a military post at what is now Barangay Tamontaka, one of the earliest Christian settlements founded south of the Philippines, in present-day Cotabato City. Spaniards already took with them Chavacano-speaking Christians and Muslims from Zamboanga and Basilan, as well as the Visayans, especially the Hiligaynons and Cebuanos.
The area of what is now South Cotabato and Sarangani provinces used to be part of Davao province until 1914, when the reorganization of the districts in Mindanao took place, thus it became part of the then-undivided Cotabato province. Settlers, who would lay the foundation of what would become a progressive province, started trooping down 1914.
The significant thrust occurred during the term of President Quezon in late 1930s. General Paulino Santos led the first of wave of settlers that time.
After World War II, the final exodus of settlers from Luzon and Visayas poured into the area's virgin land. In the early 1960s as population, trade and industries grew in southern part of Cotabato, a clamor of local self-governance arose. Thus, on July 18, 1966, South Cotabato was separated from Cotabato as an independent province. At that time, the province consisted of 11 municipalities, namely: Banga, South Cotabato, General Santos (now a city), Glan, Kiamba, Koronadal, Maitum, Norala, Polomolok, Surallah, Tantangan, and Tupi. These municipalities were established long before the creation of the province. Other component municipalities were formed after it fully functioned as a province.
With the creation of regions under Pres. Ferdinand Marcos, South Cotabato was grouped with Region XI, also known as Southern Mindanao, in 1975.
In 1992, the province of Sarangani was formed out of South Cotabato. Seven towns in southern and coastal section of the province (Malungon, Alabel, Malapatan, Glan, Maasim, Kiamba and Maitum) became part of the new province, leaving South Cotabato with 11 remaining municipalities.
Regional offices were relocated to South Cotabato in accordance with EO 429 dated October 12, 1990, issued by President Corazon C. Aquino during the expansion of the newly created Autonomous Region in Muslim Mindanao, and EO No. 36 dated September 19, 2001, issued by President Gloria Macapagal Arroyo which says South Cotabato is to be transferred from Southern Mindanao region to Region XII and having the city of Koronadal as the regional center of Region XII.
On August 16, 2000, Republic Act No. 8803 was approved, that converted the municipality of Koronadal into a component city of South Cotabato.
In 2015, the National Competitiveness Council declared the province as the 4th most competitive province in the country.