Cowlitz County, Washington
Cowlitz County, Washington, has 114,885 residents (July 2025 estimate). Its county seat is Kelso. It uses Pacific Time and covers 1,141 sq mi (2,956 km²) of land.
- Resident population, July 2025
- 114,885
- Land area
- 1,141 sq mi (2,956 km²)
- County seat or government
- Kelso
- Time zone
- Pacific TimeUTC-08:00 in January; UTC-07:00 in July
- Median household income
- $76,531 ± $3,128
- Median home value
- $397,500 ± $10,389
- Median rent, with utilities
- $1,206 ± $39
- Homes lived in by their owners
- 68% ± 1.8 points
- County type
- County
- Metro or micro area
- Longview-Kelso, WA metro areaCentral county
- Water area
- 25.2 sq mi (65.4 km²)
- State
- Washington
- County code (FIPS)
- 53015
- Coordinates (central point)
- 46.196785, -122.678460
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 Cowlitz 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
- 9863250,635 people
- 9862626,892 people
- 9867417,525 people
- 986119,302 people
- 986257,655 people
- 986012,585 people
- 986452,216 people
- 986031,267 people
- 98649929 people
- 98581419 people
- 98616192 people
- 986090 people
12 ZIP Code areas overlap Cowlitz 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
Cowlitz 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 Cowlitz County, largest first
- Longview Public Schools46,818 people
- Kelso School District30,961 people
- Woodland School District16,975 people
- Castle Rock School District10,165 people
- Kalama School District7,920 people
- Toutle Lake School District4,369 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.
- Longview, Washington (city)38,069 people
- Kelso, Washington (city)12,684 people
- Woodland, Washington (city)6,487 people
- Lexington, Washington (CDP)4,413 people
- Longview Heights, Washington (CDP)4,357 people
- Kalama, Washington (city)3,050 people
- Castle Rock, Washington (city)2,217 people
- Beacon Hill, Washington (CDP)1,804 people
- Ryderwood, Washington (CDP)401 people
- Cougar, Washington (CDP)151 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Columbia County, Oregon26 mi southwest
- Lewis County, Washington30 mi northeast
- Clark County, Washington31 mi south
- Wahkiakum County, Washington36 mi west
- Skamania County, Washington37 mi east
Before using this answer on a form
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