The oldest swimming club in India is the Calcutta Swimming Club (CSC) located in Kolkata. It was originally established as the Calcutta Swimming Bath in 1887 by order of the Lieutenant Governor of Bengal. The club has a long history dating back to the late 19th century and is known for having one of the largest outdoor swimming pools in Asia. It started as a facility primarily for Englishmen and colonial officials but has evolved over time to become a prominent social and sports club in India.