I've been to a few in my lifetime, but none lately. Last one I went to was a few years back. :( The closest one is Worlds of Fun, which I haven't been to, despite living in northeastern Kansas for quite a few years now. Can't find anyone that wants to go out with me! I have been to Oceans of Fun though, but that's a waterpark. Does that count? Because if so there's a rather nice waterpark I went to in Japan called Kenji World I don't have on this list. XD
- There's a really small one I used to go up to as a kid called Bay Beach, up in Green Bay, Wisconsin. The park is actually more like a state fair since it's small and uses tickets to get on rides instead of general admission, but it's a permanent place. It's a fun day trip, or it was when I was a kid. Haven't been since I was in high school, iirc. Maybe even middle school.
- Six Flags Great America. It was about four or so hours away from where my grandparents lived, but we drove out there a few times when I was a preteen. Loved the roller coasters. :)
- Went to at least one smaller one when I lived in Japan but I don't remember what it was called or where it even was.
- Last place I went to was Europa Park, when I was visiting my mom and little brother in Germany the summer between college semesters. (My mom was still in the US Air Force and stationed in Germany.) It's kind of fuzzy, but I want to say the park was separated into little sections based on western European countries in the EU. It was a lot of fun. It had several rollercoasters we tried out, but one was so scary because I thought I was going to fall off every time we turned. ;~;