Oregon is a state in the northwestern United States, one of the so-called Pacific states. The population of the state is 4 200 000 people. The state capital is Salem, and the largest city is Portland. Other major cities are Eugene, Gresham, Beaverton, Medford, Corvallis, Springfield, Astoria. The official motto of the state is "Flies on its own wings." The official nickname is "Beaver State" or "Beaver State". Oregon is the only US state to have a double-sided flag. The state seal is shown on one side and the beaver on the back.