Oregon's climate—particularly in the western part of the state—is heavily influenced by the Pacific Ocean. The climate is mild, but periods of extreme hot and cold can affect parts of the state.

In 2000, 2,810,654 Oregonians—87.9 of the population five years old or older—spoke only English at home, down from 92.7% in 1990.

The United States dollar, denoted by USD or the symbol $, is the official currency used in the United States. Commonly referred to as the "American dollar," the currency is divided into 100 cents (symbol ¢)

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As of 2009, Oregon has an estimated population of 3,825,657, which is an increase of 404,258, or 11.8%, since the year 2000. This includes a natural increase since the last census of 75,196 people (that is 236,557 births minus 161,361 deaths) and an increase due to net migration of 150,084 people into the state.

Salem is the capital of the U.S. state of Oregon, and the county seat of Marion County. It is located in the center of the Willamette Valley alongside the Willamette River, which runs north through the city.