(Portland, OR) -- Oregon is home to some of the most dangerous big cities in America. That's according to a new report by Alarms.org ranking the top 100 most dangerous cities in the U.S. Portland ranked ninth among the most dangerous large cities. Gresham ranked 30th, and Salem ranked 41st. Eugene ranked 58th. Alarms.org compiled the list by analyzing data reported by police departments and other law enforcement agencies across the country.