The City of Koronadal, also known as Marbel, is the capital city of South Cotabato province in the Philippines. According to the 2000 census, it had a population of 133,786 people in 27,623 households.
Koronadal became a component city in 2000. By virtue of Executive Order No. 304, dated March 30, 2004, Koronadal City became the regional center of the SOCCSKSARGEN region. In 2007, it was recognized "Most Competitive City" in the small-city category.
The municipal government of Koronadal began its official function on January 1, 1948 with an approved Annual Estimated Budget of P30,000.00. The land area of the municipality by then was comparable with the Province of Bata-an embracing the present municipalities of Tampakan, Tupi, Banga, Lake Sebu, Surallah, T'Boli, Sto. Niño, Norala, and Isulan.
Municipal Council Resolution No. 32, Series of 1948 mandated and proclaimed January 10 of each year as the Municipal Town Fiesta commemorating the foundation of Marbel Settlement District of the National Land Settlement.
Koronadal was converted into a component city of South Cotabato now known as the City of Koronadal by virtue of Republic Act 8803 on October 8, 2000.