The Free Wesleyan Church of Tonga (FWCT; Tongan: Siasi Uēsiliana Tau‘atāina ‘o Tonga) is a Methodist denomination in Tonga. It is the largest Christian denomination in the nation and is often mistaken to be its state church. It has its roots in the arrival of the first missionaries from the London Missionary Society and the ministry of the Wesleyan Methodist Mission Society, the latter of which cemented its Methodist identity.
The Tongan Royal Family has had a close relationship with the denomination since the arrival of Christianity on the island, and many of them have been prominent members; thus, with these factors, the FWCT can be considered a de facto state church.