Quick Facts
| County seat | Saint Helens |
|---|---|
| Region | Northwest Oregon |
| Population (2020 Census) | 54,091 |
| Land & water area | 657 sq mi |
| Population density | 82.3 people per sq mi |
| Established | 1854 |
| Formed from | Northern half of Washington County |
| Name origin | Named for the neighboring Columbia River. |
| Incorporated cities | 7 |
| Main electric utility | Portland General Electric |
| FIPS code | 41009 |
| Official county website | co.columbia.or.us |
About Columbia County
Columbia County is one of the 36 counties in the U.S. state of Oregon. As of the 2020 census, the population was 52,589. The county seat is St. Helens.
Source: adapted from Wikipedia, available under CC BY-SA 4.0.
Cities in Columbia County
| City | Population (2020) | Incorporated |
|---|---|---|
| St. Helens | 13,817 | 1889 |
| Scappoose | 8,010 | 1921 |
| Vernonia | 2,374 | 1891 |
| Columbia City | 1,949 | 1926 |
| Rainier | 1,911 | 1885 |
| Clatskanie | 1,716 | 1891 |
| Prescott | 82 | 1947 |
★ county seat. Cities that span more than one county are listed in each.