"And the mystery of UFO Sightings in the Pacific Northwest continues today. According to a study by 24/7 Wall St., Oregon ranked second in the US for most reported UFO sightings per 100,00 people from 2001-2015. Washington ranked third. The only state with more reported sightings per 100,000 people was Vermont." Oregon among top states for UFO sightings An unidentified flying object that hovered over Pendleton last week left some residents with questions. But this is nothing new for people in the Pacific Northwest.