The majority town folks of Krishnagiri are Hindus, Christians and Muslims. Krishnagiri is the place of galore of Religious institutions of all religions. All the people here at Krishnagiri live in harmony and preach brotherhood among different religions.
Krishnagiri houses more than 50 temples. Famous and important temples of them are as follows:
Kattu Anjanaeyar Temple located in outskirts of the town attracts many devotees everyday
Subrahmaniya Swamy Temple in Katnampatti near Govt. Arts College famous for Kavadi
Narasimma Swamy Temple in Oldpet
Navaneetha Krishnan Temple in Pudupet
Dharmaraja Temple in Oldpet is famous for Bharatham (annual Mahabharatham recitation) and Terukkuttu
Sivan Temple in T.V.Malai road
Churches like C.S.I Christ Church (more than 350 member families), Fathima Church - Vincent de paul Parish (a Traditional Roman Catholic Church) and I.E.L.C Church are all situated in the Bengaluru road.
A lot of Mosques are found inside in the town as well as the areas surrounding the National Highway 7. Krishnagiri Dharga located near new bus stand is significant in this district. Syed Basha hill also houses a Mosque which is crowded during the festivities.
A big dyana mandapam for the Jains is also found at the center of the town. Krishnagiri Samithi of the Sathya Sai Organization located opposite to Govt. Girls School is famous in this district
