Highlights on the Population of the Municipality of Kabacan, Cotabato based on the 2015 Census of Population. On August 1, 2015, the municipality of Kabacan has recorded a population of about 89,161 persons. This count ranked 6th among the 17 municipalities and 1 city of Cotabato Province and it comprised about 6.46% of the province’s total population which is 1,379,747. From 2010 to 2015 the population has increased by 7,879 and 27,163 persons from 2000 to 2015.