Oregon is a state located in the Pacific Northwest region of the United States. It is known for its diverse landscapes, ranging from rugged coastline and dense forests to mountains, high desert, and fertile valleys. Oregon is bordered by Washington to the north, California to the south, Idaho to the east, and Nevada to the southeast. With 4.2 million people over 98,000 square miles (250,000 km2), Oregon is the ninth largest and 27th most populous U.S. state.