The Capital of Wisconsin is Madison and we live here! The plans for the Wisconsin state capital building are almost identical to the DC capital building. Aka this building is quite large. The plans had to be made different from the nation's capital for obvious reasons, so the Madison building has a smaller rotunda and that is about it. Granted this is just what a local told me so who knows how true that is. Nonetheless it is a pretty cool did you know? type of info to log in your brain.