List of former Catholics

One 2008 Pew Research Center study estimates that 10.1% of people in the United States describe themselves as former Catholics in some sense.

[1] A significant number of former Catholics join mainline Protestant denominations with a similar worship pattern, such as Lutheranism or Anglicanism, while others have become Evangelical Christians.

However, the movement disappeared shortly after World War II, and was last referenced in Allied occupation documents in 1946.

The same survey noted that some Catholics incorporate "yoga as a spiritual practice", emphasize psychics, and draw on and involve themselves in other religious movements.

[59] This section contains people who rejected Catholicism in favor of a non-religious philosophy, including atheism, agnosticism and secular humanism.

Adolf Hitler and several other key Nazis had abandoned the Catholic Church in their late-teens and early twenties.
Magdi Allam , left Islam for Catholicism, then left Catholicism.
Marie Curie , double Nobel Prize winner