Devikulam's history is intertwined with the legends of Ramayana, with Sita Devi Lake being a central point of interest. The region has long been inhabited by indigenous communities, and later became part of the Kingdom of Travancore. The introduction of tea plantations in the 19th century by the British transformed the landscape and economy of Devikulam. The area's natural beauty and pleasant climate soon attracted tourists, leading to its development as a hill station. Today, Devikulam retains its tranquil charm while offering modern amenities to visitors.