Ranking of Oregon Counties By Population Density from Census 2020

According to the data from the US 2020 Census, as at April 2020, among all Oregon counties, Multnomah County had the highest population density per square mile (1.89K people per sqr mile), followed by Washington County (828.93 people per sqr mile), and Marion County (292.88 people per sqr mile).

On the other hand, Harney County had the lowest population density (0.74 people per sqr mile), followed by Wheeler County (0.85 people per sqr mile), and Lake County (1.00 people per sqr mile).

The chart below shows the top 10 counties with high population density, and the table below shows the ranking of all Oregon counties.

You can also see similar ranking of counties information for other states as well as for all counties in the United States.