There are 9 cities in Columbia County, Oregon.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
St. Helens1Oregon14,74313,9121.29%3,0704.80
Scappoose2Oregon8,5468,0201.88%3,1252.73
Vernonia3Oregon2,4352,3790.37%1,4791.65
Columbia City4Oregon1,9131,954-0.78%2,4400.78
Rainier5Oregon1,9111,907-0.05%4684.08
Clatskanie6Oregon1,7611,7280.29%1,3591.30
Warren7Oregon1,6081,876 2556.31
Deer Island8Oregon230105 4710.49
Prescott9Oregon83801.22%1,2030.07
showing: 9 rows

Cities in Columbia County, Oregon by Population (2024)

What is the largest city in Columbia County, Oregon?

St. Helens is the largest city in Columbia County.

What is the smallest city in Columbia County, Oregon?

Prescott is the smallest city in Columbia County.

How many cities are in Columbia County?

There are 9 cities in Columbia County, Oregon.

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