By Kent Fillinger AVERAGE SIZE Megachurches: 4,810 Emerging Megachurches: 1,354 Combined average weekly attendance: 382,144 The three largest megachurches account for more than 20 percent of all megachurch attendees. GROWTH RATES Megachurches: 5.6 percent (up from 3 percent in 2012); overall, 73 percent of megachurches grew. Emerging Megachurches: 2.4 percent (down from 4 percent in 2012); overall, 52 percent of emerging megachurches grew. FASTEST-GROWING CHURCHES 2|42 Community Church, Brighton, MI, 112% Third City Christian Church, Grand Island, NE, 31.6% Eastside Christian Church, Anaheim, CA, 26.3% Current””A Christian Church, Katy, TX, 22.1% Ten Mile Christian Church, Meridian, ID,