Ryan Burge, a political scientist at Eastern Illinois University and a Baptist pastor, found that 23.1% of Americans now claim no religion.
Catholics came in at 23.0%, and evangelicals were at 22.5%.
The three groups remain within the margin of error of each other though, making it a statistical tie. Over 2,000 people were interviewed in person for the survey.
"Religious nones," as they are called by researchers, are a diverse group made up of atheists, agnostics, the spiritual, and those who are no specific organized religion in particular. A rejection of organized religion is the common thread they share.