Yes, there is a Moundville, Wisconsin. I have ancestors who settled there when they came to the United States from England and Ireland. It is just north of Madison and Portage on highway 39. I was able to find it using Google maps. They put a pointer there even though there is no name printed on the map itself. I think it is a very small place. Good luck finding it.
I also have ancestors who died in that area, one even in 1850.