74.13% of Central Kalimantan's population was Muslim in June 2021.

The Directorate General of Population and Civil Registration (Dukcapil) of the Ministry of Home Affairs (Kemendagri) recorded that 1.96 million people in Central Kalimantan were Muslim as of June 2021. This figure represents 74.13% of Central Kalimantan's total population of 2.64 million.

439,810 people, or 16.66% of Central Kalimantan's population, are Christian. 152,650 people, or 5.78%, practice Hinduism.

86,700 people, or 3.28% of the population, are Catholic. 2,810 people, or 0.11%, are Buddhist.

176 people, or 0.01% of the population, practice Confucianism. 869 people, or 0.03%, adhere to indigenous beliefs.

By gender, 1.36 million people, or 51.69%, are male. 1.28 million people, or 48.31%, are female.

Based on marital status, 1.25 million people, or 47.19%, are unmarried. 1.29 million people, or 48.73%, are married.

31,420 people, or 1.19%, are divorced. 76,360 people, or 2.89%, are widowed.

Central Kalimantan is one of the provinces in Kalimantan with an area of 153,564 square kilometers and a population density of 17 people per square kilometer. Administratively, Central Kalimantan is divided into 13 regencies and 1 city, comprising 136 districts, 1,432 villages, and 138 urban villages.