 , there were 2 hotels in Castel San Pietro.From the , 1,484 or 85.9% were Roman Catholic, while 87 or 5.0% belonged to the Swiss Reformed Church.There are 123 individuals (or about 7.12% of the population) who belong to another church (not listed on the census), and 34 individuals (or about 1.97% of the population) did not answer the question.