Tharangambadi's population is 20,841.

Tharangambadi was created in 1620.

The CSI was inaugurated in September 1947 at St. George's Cathedral Chennai. It was formed from the union of the South India United Church (itself a union of churches from the Congregational, Presbyterian and Reformed traditions) and the southern provinces of the Anglican Church of India, Pakistan, Burma and Ceylon and the Methodist Church of South India. In 1990s, a small number of Baptist and Pentecostal churches also joined the union.

Discussions about the merging of South India's Protestant denominations began at a 1919 conference at Tranquebar (today known as Tharangambadi), and by the independence of India in 1947, the union was achieved and the CSI officially established