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Washington vs Oregon population, 1990 to 2025

Washington leads Oregon in 2025 population: 8,001,020 vs 4,273,586. Compare annual state data from 1990.

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What the data shows

  • Washington: 4.9M in 1990, 8M in 2025 (1.6× higher).
  • Oregon: 2.9M in 1990, 4.3M in 2025.

About this chart

Washington had the larger population in 2025: 8,001,020 versus 4,273,586 for Oregon, a gap of 3,727,434. Over the full period from 1990, Washington grew by 63.3%, while Oregon grew by 49.5%. Washington was ahead in 1990 and remained ahead at every annual observation in the displayed series. The comparison uses the same reference year for both states.

The Census series compares July 1 resident populations for Washington and Oregon. In 1990, their counts were 4,900,780 and 2,858,547, respectively. Estimates from different Census vintages are joined across decades, and revisions can affect the measured trend. These state totals include residents throughout each state rather than only its cities. They describe the scale and direction of population change but do not, on their own, separate births, deaths and migration.

The data

Source: U.S. Census Bureau population estimates, July 1 (vintages 1999, 2000–2010 intercensal, 2020 and 2025), people. Retrieved November 5, 2026. July 1 resident population estimates. Different Census vintages are joined across decades; revisions can affect comparisons.

Washington vs Oregon population, Resident population, 1990 to 2025, 1990–2025
DateWashingtonOregon
19904.9M2.9M
19915M2.9M
19925.1M3M
19935.2M3M
19945.3M3.1M
19955.4M3.1M
19965.5M3.2M
19975.6M3.2M
19985.7M3.3M
19995.8M3.3M
20005.9M3.4M
20016M3.5M
20026.1M3.5M
20036.1M3.5M
20046.2M3.6M
20056.3M3.6M
20066.4M3.7M
20076.5M3.7M
20086.6M3.8M
20096.7M3.8M
20106.7M3.8M
20116.8M3.9M
20126.9M3.9M
20137M3.9M
20147.1M4M
20157.2M4M
20167.3M4.1M
20177.4M4.1M
20187.5M4.2M
20197.6M4.2M
20207.7M4.2M
20217.7M4.3M
20227.8M4.2M
20237.8M4.3M
20247.9M4.3M
20258M4.3M

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Frequently asked questions

Which has a larger population, Washington or Oregon?

Washington had the larger population in 2025, at 8,001,020 compared with 4,273,586 for Oregon. The gap was 3,727,434 residents.

How have Washington and Oregon changed since 1990?

Washington moved from 4,900,780 to 8,001,020, a 63.3% increase. Oregon moved from 2,858,547 to 4,273,586, a 49.5% increase.

What exactly is being compared?

Census July 1 resident population estimates for the two whole states. The series combines Census vintages and does not isolate the causes of population change.

Where does this data come from?

U.S. Census Bureau population estimates, July 1 (vintages 1999, 2000–2010 intercensal, 2020 and 2025), people. Retrieved November 5, 2026. July 1 resident population estimates. Different Census vintages are joined across decades; revisions can affect comparisons. You can download the full table as a CSV from this page.

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