Population Growth: Oregon Total Population

In 2015, Oregon's population reached a milestone number: 4 million. The Population Research Center's estimate of the July 1, 2015 population is 4,013,845.

As described by William Loy, Stuart Allen, Aileen Buckley and James Meacham in the Atlas of Oregon, our state was originally settled by waves of immigrants arriving from northeastern Asia. The archeological record of human activity dates back 11,000 years, but evidence suggests that the earliest immigrants probably passed through the region between about 14,000 and 18,000 years ago. There were probably between 50,000 and 100,000 people living in what is now Oregon when the first Europeans arrived at the mouth of the Columbia in the late 18th century (Atlas of Oregon, 2nd Edition, Page 10).

Our story of population growth begins the year after the 1859 establishment of Oregon as a state with its current boundaries. Its population in 1860 was 52,465. It took 75 years for Oregon to reach its first million in 1934. Since then the pace of each succeeding million has been much more rapid: 2 million was achieved in 1967, only 33 years after the first million milestone. Oregon reached 3 million by 1993, only 26 years later. It has taken only 22 years to add the 4th million.

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