Cowlitz County, WA ZIP Codes
10 ZIP codes cover all or part of Cowlitz County, Washington. The Census Bureau counts 112,360 residents in the county, with a median household income of $76,531 and a median home value of $397,500. Median household income ranges from $66,305 in 98632 to $116,435 in 98625. Its largest communities include Longview, Kelso, Woodland, Lexington and Longview Heights.
Cowlitz County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 112,360 |
| Households | 43,943 |
| Median household income | $76,531 |
| Median home value | $397,500 |
| Median age | 41.5 |
| Median rent | $1,206 |
All 10 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 116,840 |
| Households (sum of ZIP codes) | 45,143 |
| Median household income, range across ZIP codes | $66,305 (98632) to $116,435 (98625) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $77,785 |
| Homeowners | 68.4% |
| Households with kids under 18 | 29.1% |
| Moved in the past year | 11.5% |
| Carrier routes in EDDM2GO's route library | 71 routes, 45,257 homes (10 of 10 ZIP codes) |
Top facts
- Highest median household income in Cowlitz County: 98625 ($116,435)
- Most residents: 98632 (50,635 people)
- Highest homeownership: 98645 (95.7% own their home)
- Most households with kids: 98603 (39.0% of households)
- Most new movers: 98632 (13.5% moved in last year)
- Youngest median age: 98674 (34.8 years)
- Highest median home value: 98674 ($538,000)
Every ZIP code in Cowlitz County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 98632 | Longview | 50,635 | 20,613 | $66,305 | $379,200 | 60.8% | 27.2% | 13.5% | 31 | 22,991 | 100% of its land |
| 98626 | Kelso | 26,892 | 10,342 | $75,528 | $368,900 | 68.5% | 32.3% | 11.8% | 15 | 10,987 | 100% of its land |
| 98674 | Woodland | 17,525 | 5,844 | $94,245 | $538,000 | 73.2% | 35.3% | 9.4% | 8 | 5,093 | 63% of its land |
| 98611 | Castle Rock | 9,302 | 3,539 | $86,322 | $425,700 | 83.8% | 27.5% | 7.8% | 8 | 3,969 | 100% of its land |
| 98625 | Kalama | 7,655 | 2,915 | $116,435 | $513,200 | 80.4% | 25.0% | 8.2% | 4 | 2,445 | 100% of its land |
| 98645 | Silverlake | 2,216 | 876 | $101,429 | $509,500 | 95.7% | 19.9% | 10.8% | 1 | 695 | 100% of its land |
| 98603 | Ariel | 1,267 | 395 | $78,281 | $464,500 | 72.9% | 39.0% | 10.1% | 1 | 429 | 100% of its land |
| 98649 | Toutle | 929 | 368 | $73,750 | $393,800 | 80.7% | 25.5% | 2.4% | 1 | 398 | 100% of its land |
| 98581 | Ryderwood | 419 | 251 | $43,009 | $232,500 | 95.6% | 0.0% | 8.1% | 1 | 178 | 100% of its land |
| 98609 | Cowlitz County | 0 | 0 | — | — | — | — | — | 1 | 14 | 100% of its land |
A ZIP code is listed for Cowlitz County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- Longview — 38,069 residents · 1 ZIP code
- Kelso — 12,684 residents · 2 ZIP codes
- Woodland — 6,487 residents · 1 ZIP code
- Lexington — 4,413 residents · 1 ZIP code
- Longview Heights — 4,357 residents · 1 ZIP code
- Kalama — 3,050 residents · 1 ZIP code
- Castle Rock — 2,217 residents · 1 ZIP code
- Beacon Hill — 1,804 residents · 2 ZIP codes
- Ryderwood — 401 residents · 1 ZIP code
Rankings
- Richest ZIP codes in Cowlitz County — 7 ZIP codes ranked
- ZIP codes with the highest home values in Cowlitz County — 7 ZIP codes ranked
- ZIP codes with the highest homeownership in Cowlitz County — 7 ZIP codes ranked
- ZIP codes with the most families with kids in Cowlitz County — 7 ZIP codes ranked
- ZIP codes with the most new movers in Cowlitz County — 7 ZIP codes ranked
- Youngest ZIP codes in Cowlitz County — 7 ZIP codes ranked
- Oldest ZIP codes in Cowlitz County — 7 ZIP codes ranked
- Fastest-growing ZIP codes in Cowlitz County — 7 ZIP codes ranked
Price a mailing to Cowlitz County ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Cowlitz County, WA?
- 98632, 98626, 98674, 98611, 98625, 98645, 98603, 98649, 98581 and 98609. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of Cowlitz County?
- 112,360 residents in 43,943 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in Cowlitz County?
- $76,531 for the county as a whole. Its ZIP codes range from $66,305 (98632) to $116,435 (98625).
- Which Cowlitz County ZIP code has the highest median household income?
- 98625, at $116,435, among ZIP codes with at least 1,000 residents. See the full ranking of Cowlitz County ZIP codes by income.
- How many carrier routes and mailboxes are in Cowlitz County?
- For the 10 of 10 ZIP codes in EDDM2GO's stored route library: 71 carrier routes reaching 45,257 residential and 1,942 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.