Is this a good college essay topic?

I have a supplemental essay with the prompt “Tell us something about you that we don’t already know (250 words)”

Can I write about how most people don’t know I’m Catholic, and how I’ve received judgement and prejudice based on my religion, and how I work to prove these judgements wrong?

I wouldn’t.

Not really a good idea.

I would focus on something that tells them more about your personality. Religion is a sensitive topic and it would be hard to do it justice in only 250 words.