Mangaladevi Kannagi Temple is a Hindu temple located at Mangaladevi, near the present-day border of Theni District and Idukki District (Kerala), about 7 km from Pazhiyankudi in Theni District and 15 km from Thekkady in Idukki District. The temple is situated at an altitude of about 1,337 m or about 5,000 feet above sea level. The temple is dedicated to goddess Mangaladevi, also known as Kannagi-Pattini. Secondary shrines are dedicated to Karuppa Swamy, lord Shiva and Ganapathy.