Mark Zuckerberg was raised Jewish, described himself as atheist in his early adult years, and in 2016 returned to Jewish religious identification — not Christianity. His statement that 'religion is very important' referred to his Jewish heritage. He is not a Christian. 25/100 Caution.
Mark Elliot Zuckerberg (born 1984, White Plains, New York) was raised Jewish — his father Edward Zuckerberg identifies as Jewish, and Mark attended Hebrew school and had a Bar Mitzvah. His mother Priscilla Chan is Buddhist. In his early adult years during the founding of Facebook, he described himself as atheist.
The significant public moment: at Christmas 2016, asked if he was still atheist, Zuckerberg responded: "No. I was raised Jewish and then I went through a period where I questioned things, but now I believe religion is very important." This was widely misread as a Christian conversion. It was not — he was describing a return to his Jewish heritage after a period of atheism. He did not say he became Christian, attended Christian church, or embraced Jesus Christ.
The search "is Mark Zuckerberg a Christian" generates traffic for two reasons: (1) the 2016 statement was misread; (2) he has been seen at church events with his wife Priscilla Chan, who attended Catholic school. Neither constitutes evidence of Christian faith. Zuckerberg identifies with his Jewish heritage. Compare with Elon Musk for a similar tech CEO faith assessment. See our Christian Celebrities hub. The Gospel Coalition and GotQuestions provide thoughtful analysis of faith and culture.