Tomlin, 40, who scored his first mainstream No. 1 album, sold 73,000 units in its first week, according to figures compiled by Nielsen SoundScan.
It was the first time a Christian album rose to No. 1 since hip-hop and pop artist tobyMac's "Eye on It" in September 2012.
Billboard credited Tomlin's strong performance to sales related to churches and a college Christian conference in Atlanta that drew about 60,000 attendees. Some 40 percent of all sales came from those sources, Billboard said.
Rap-rockers Hollywood Undead's "Notes from the Underground" entered the charts at No. 2, selling some 53,000 units.
The soundtrack to the big screen adaptation of Broadway musical "Les Miserables," last week's top album, came in third.
This week's chart, which tracks sales through January 13, did not reflect any boost in