Back مقاطعة كولومبيا (أوريغون) Arabic کولومبیا بؤلگهسی، اورقن AZB Columbia County, Oregon BAR Колумбия (окръг, Орегон) Bulgarian কলম্বিয়া কাউন্টি, অরেগন BPY Columbia Gông (Oregon) CDO Колумбия (гуо, Орегон) CE Columbia County (kondado sa Tinipong Bansa, Oregon) CEB Columbia County (Oregon) Czech Columbia County, Oregon Welsh
Columbia County | |
|---|---|
 Columbia County Courthouse in St. Helens | |
 Location within the U.S. state of Oregon | |
 Oregon's location within the U.S. | |
| Coordinates: 45°57′N 123°05′W / 45.95°N 123.08°W | |
| Country |  United States |
| State |  Oregon |
| Founded | January 16, 1854 |
| Named for | Columbia River |
| Seat | St. Helens |
| Largest city | St. Helens |
| Area | |
| • Total | 688 sq mi (1,780 km2) |
| • Land | 657 sq mi (1,700 km2) |
| • Water | 31 sq mi (80 km2) 4.5% |
| Population (2020) | |
| • Total | 52,589 |
| • Estimate (2023) | 53,880  |
| • Density | 75/sq mi (29/km2) |
| Time zone | UTC−8 (Pacific) |
| • Summer (DST) | UTC−7 (PDT) |
| Congressional district | 1st |
| Website | www |
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.[1] The county seat is St. Helens.
- ^ "State & County QuickFacts". United States Census Bureau. Retrieved May 17, 2023.