Oregon (State of Oregon) is in the western region of the United States, near the Pacific Ocean, and borders California. The state has a land area of 250,000 square kilometers and a population of about 3.9 million. The geographical location makes Oregon's economy develop well, and the economy is extremely developed in the United States, with a high per capita income. Oregon is a well-known high-tech center in the United States and a financial city. The state's transportation is very convenient, and its proximity to the Pacific Ocean allows the state to have many ports and developed foreign trade. The main port is Portland (Portland), and the main airport is also in the city of Portland. Other cities include Portland, Beaverton, Lake Oswego, Corvallis, Eugene, Hood River , Medford, etc. The abbreviated ZIP code for Oregon is OR and the area code is 503 - 541 - 971. The postcodes for the major cities are as follows: Salem is 97301-97314. The zip code for Portland is 97201-97299. Eugene's zip code is 97401-97440. The zip code for Corvallis is 97330-97339.