Columbia County, Oregon
Columbia County, Oregon, has 54,091 residents (July 2025 estimate). Its county seat is St. Helens. It uses Pacific Time and covers 659 sq mi (1,706 km²) of land.
- Resident population, July 2025
- 54,091
- Land area
- 659 sq mi (1,706 km²)
- County seat or government
- St. Helens
- Time zone
- Pacific TimeUTC-08:00 in January; UTC-07:00 in July
- Median household income
- $87,458 ± $4,578
- Median home value
- $421,600 ± $12,804
- Median rent, with utilities
- $1,373 ± $123
- Homes lived in by their owners
- 76.1% ± 2.0 points
- County type
- County
- Metro or micro area
- Portland-Vancouver-Hillsboro, OR-WA metro areaOutlying county
- Water area
- 30.3 sq mi (78.5 km²)
- State
- Oregon
- County code (FIPS)
- 41009
- Coordinates (central point)
- 45.941932, -123.081079
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Columbia County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Pacific TimeAmerica/Los_Angeles | UTC-08:00 in January; UTC-07:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 9705117,347 people
- 9705612,795 people
- 970487,099 people
- 970166,573 people
- 972314,308 people
- 970643,855 people
- 970533,634 people
- 970182,006 people
- 970541,494 people
9 ZIP Code areas overlap Columbia County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
Columbia County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Columbia County, largest first
- St. Helens School District 50222,891 people
- Scappoose School District 1J15,534 people
- Rainier School District 137,817 people
- Clatskanie School District 6J5,414 people
- Vernonia School District 47J4,099 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- St. Helens, Oregon (city)14,258 people
- Scappoose, Oregon (city)8,179 people
- Vernonia, Oregon (city)2,786 people
- Clatskanie, Oregon (city)2,364 people
- Rainier, Oregon (city)2,130 people
- Columbia City, Oregon (city)2,006 people
- Warren, Oregon (CDP)1,637 people
- Deer Island, Oregon (CDP)199 people
- Prescott, Oregon (city)34 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Cowlitz County, Washington26 mi northeast
- Washington County, Oregon27 mi south
- Wahkiakum County, Washington29 mi northwest
- Clatsop County, Oregon30 mi west
- Clark County, Washington31 mi east
- Multnomah County, Oregon42 mi southeast
- Tillamook County, Oregon47 mi southwest
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
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