The main religion in Bangkok is Buddhism, which is followed by 92% of the population.

An excerpt from the article 31 facts about Thailand

There are over 400 Buddhist temples, 55 mosques (Muslims make up 6% of the population), and 10 churches (1% of the population are Christians) in the city.

The oldest Buddhist temple is Wat Pho (Temple of the Reclining Buddha) from the 16th century with a huge statue of Buddha. The next temple - Wat Traimit - has a 5.5-ton golden Buddha statue, 3 meters high.