I don't want to date a woman who has kids
Why don't you want to date a woman with children?
I don't like kids and don't want them either.
Not everyone loves children and that is certainly your personal choice. It's good that you are upfront about how you feel about not dating someone with children. That way, no one will be misled or get their feelings hurt.
I know but some guys like that and I'd like to leave that option open for them.
Well that's great. But maybe if you find someone you really like you might be open if she had a child right?