The Congregational Christian Church of Tuvalu, commonly the Church of Tuvalu, is a Christian church which is the state church of Tuvalu, although this status merely entitles it to "the privilege of performing special services on major national events"; its adherents comprise about 86% of the 11,600 inhabitants of the archipelago.

Tuvalu, formerly known as the Ellice Islands, is an island country in the Polynesian subregion of Oceania in the Pacific Ocean, about midway between Hawaii and Australia. It lies east-northeast of the Santa Cruz Islands, northeast of Vanuatu, southeast of Nauru, south of Kiribati, west of Tokelau, northwest of Samoa and Wallis and Futuna, and north of Fiji.