Atheists/non religious people, at what age did you leave Religion and why?

I was about 13 or so when I realized religions are just mythologies people still believed and there was no good reason to think any god or gods actually exist.

I was never seriously indoctrinated. So I didn't have the problem of needing to revert to reality. I never left it. Even as a small girl, I knew those dolls I had conversations with were pretend. Some adults still haven't separated the two.

Was around 9 when a nun admonished me with "JESUS DIED FOR YOU." Scared the sh!t out of me.
Then I got onto more trouble by bothering them with question which they could not answer.

It was a Catholic nun that drove me to atheism...And I never wrote to thank her! (Apologies to W.C. Fields)

I'm not certain what you mean by 'leave religion', but I was about 8 when I realized that believing in Gods was foolish and made no sense.

I had my doubts shortly after discovering the truth about Santa and the Tooth fairy long before my tenth birthday. I held on until just before I joined the US Army at 21, when I discarded the pretense altogether.

that because of you

About 20. I left after finally reading the Bible and discovering it has no relevance.

I left Christianity because its too specific and also, logic. But I still believe in a higher power because I have had many undeniably spiritual experiences.

It also makes sense that 30% of people "raised as atheists" ended up joining a religion.

Roughly 50% of those raised as Atheists end up joining a religion. 30% stay Atheist, about 20% become a ‘none,’ and the other roughly 50% join a religion.

I left my religion back in my 20s and I stupidly gave in to the peer pressure of atheism I thought it was so cool that is until they helped me to become a crack cocaine addict and helped milk $400,000 out of me and helped me to find myself in a jail cell after which all they did was laugh at me. no friend if you offered me every single Dollar on the planet Earth you could not get me to go back to being an atheist not for anything what I really so she ate myself with those scumbags