That's according to Outreach Magazine's annual "100 Largest and Fastest-Growing Churches in America" issue. (Each church's attendance surveys are self-reported and not audited, FYI.)
You can't look inside the magazine without buying it, but Mars Hill p.r. contact Justin Dean was happy to give me the details: Mars Hill is the 28th-largest church in the country with 14 locations in four states and plans to open 5 more in the next 12 to 18 months. In last year's issue, it was ranked the 43rd-largest church in America.
In the past 12 months, its weekly attendance has supposedly grown by 3,530 to over 13,000. That's impressive, especially given the church's public image problems—reporters from The Stranger to the New York Times to Slate have questioned Pastor Mark Driscoll's machismo theology, his bullying leadership structure, his odd claims to have supernatural powers, and the church's micro-management of its members' lives.
To his earliest critics, Driscoll just seemed like a grotesque curiosity. But his continuing rise to power begs a deeper look. He's obviously tapping into something in the culture—I'm guessing a backlash against the gains made by women and gays in mainstream politics has something to do with it.
Or, you know, he's one of God's true messengers, if you go in for that kind of thing.