95% of Jambi'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 the population of Jambi was 3.56 million in June 2021. Of this number, 3.38 million people, or 95.07%, are Muslim.

116,920 people, or 3.29% of Jambi's population, are Christian. 34,430 people, or 0.97%, are Buddhist.

Furthermore, 20,650 people, or 0.58%, are Catholic. 801 people, or 0.02%, are Confucian.

482 people, or 0.01%, are Hindu. Meanwhile, 1,953 people, or 0.05%, adhere to indigenous beliefs.

Based on gender, 1.81 million people, or 50.92%, are male. Meanwhile, 1.75 million people, or 49.08%, are female.

According to marital status, 1.63 million people, or 45.75%, are unmarried. 1.79 million people, or 50.19%, are married.

34,370 people, or 0.97%, are divorced. Meanwhile, 109,920 people, or 3.09%, are widowed.

Jambi is one of the provinces in Sumatra with a land area of 50,058 square kilometers and a population density of 71 people per square kilometer. Administratively, Jambi is divided into 9 regencies and 2 cities, comprising 141 districts, 1,399 villages, and 163 urban villages.