Over the years, there have been a lot of UFO sightings throughout the United States, but if we take a look closer to home, what cities in Illinois and Wisconsin have seen the most aliens? What Cities In Wisconsin And Illinois Have The Biggest Histories Of UFOs? READ MORE: Magic Mushrooms Landed Illinois Residents Into Legal TroubleAccording to WBAY TV 2 News...Stacker compiled a ranking of cities with the most UFO sightings in Wisconsin using data from the National UFO Reporting Center. According to Stacker...Stacker compiled a ranking of cities with the most UFO sightings in Illinois using data from the National UFO Reporting Center. M-Production M-ProductionTo be honest, I've very surprised on how many UFO sightings have been reported in Rockford.