Largest Cities In Oregon 2024. 416 rows portland is the biggest city in oregon, with a population of 622,882 in 2024. Oregon's unique character is reflected in its diverse cities, making it an ideal destination for renters looking to call the pacific northwest home.

Here’s a list of the largest oregon cities by population + land area. Much of oregon’s population is concentrated in the willamette valley from eugene to the south through corvallis, salem, and portland, the largest city.