TN tops nation in megachurches per capita. Mega-size, megachurch: A ranking of area megachurches. Tennessee is one of eight states that has more than 50 megachurches within its borders. Tennessee's 67 megachurches trails only four other states: California (219), Texas (207), Florida (120) and Georgia (91).ennessee can now back its moniker as the buckle of the Bible Belt with solid numbers. In a new visualization from Vox, Tennessee is revealed to be one of eight states that has more than 50 megachurches within its borders, as well as the state with the most megachurches per capita.