Population
39,722
Lake OswegoCensus, July 2025
From 40,876 in July 2020 to 39,722 in July 2025.
The Census Bureau's estimate of everyone living here on July 1.
Lake Oswego by the numbers
Official figures for Lake Oswego. Each one shows its date, its source and the area it covers. A figure for a larger area says so.
People
Change in a year
-0.6%
Lake OswegoCensus, 2024 to 2025
Change in the population estimate over one year, from July 1 to July 1, both from the same release.
Change over 5 years
-2.8%
Lake OswegoCensus, 2020 to 2025
Change in the population estimate over five years, from July 1 to July 1, both from the same release.
Sources
- U.S. Census Bureau, Population Estimates, Vintage 2025 · Public domain
Figures are shown as each source publishes them. Survey figures carry a 90% margin of error. A figure for a larger area is labelled with that area.