Kallil Temple is a Jain temple located in the Ernakulam district of Kerala. This is the oldest Jain temple in Kerala. Studies indicate that the temple dates back to the 3rd century BC. It is located in the south Indian state of Kerala, 12 km from Perumbavoor in the Ernakulam district of Kerala. It is one of the protected monuments in Kerala under the Archaeological Survey of India. The Kallil Cave Temple is also a protected monument under the protection of the Archaeological Survey of India. It is believed that the temple was a place where Jain monks performed penance. It is believed to have become a Hindu temple in the ninth century.