Market insights · Washington
Cowlitz County, WA: growth, migration and housing
Cowlitz County has 114,885 residents, up 3.5% since 2020 (+1.0% in the last year). In 2022–2023, 2,903 households moved in and 2,662 moved out (+241 net), bringing in a net $37.6M of income. Median household income is $76,531, the median home $397,500 and median rent $1,206 a month.
In Washington: 24th of 39 counties for 5-year population growth · 20th of 39 counties for net in-migration (per resident) · 18th of 39 counties for median household income · 22nd of 39 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Cowlitz County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Clark County, WA | 955 | $69.8M |
| Multnomah County, OR | 149 | $10.2M |
| Lewis County, WA | 134 | $7.1M |
| Columbia County, OR | 115 | $6.1M |
| Washington County, OR | 86 | $8.1M |
| King County, WA | 81 | $5.7M |
| Pierce County, WA | 75 | $5.2M |
| Clackamas County, OR | 74 | $6.5M |
Where leavers went
Top counties by households leaving Cowlitz County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Clark County, WA | 744 | $46.6M |
| Lewis County, WA | 171 | $13.6M |
| Multnomah County, OR | 119 | $4.8M |
| Columbia County, OR | 84 | $5.2M |
| King County, WA | 78 | $5.5M |
| Thurston County, WA | 65 | $3.4M |
| Maricopa County, AZ | 56 | $3.9M |
| Washington County, OR | 54 | $3.5M |
BizyFi in Cowlitz County
Fewer than 3 companies in the BizyFi directory are based here. Search them on the company map (company names with a free account), or browse Washington companies.
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Sources: U.S. Census Bureau population estimates (vintage 2025), American Community Survey 5-year (2024), and IRS Statistics of Income county-to-county migration data (2022–2023). Migration counts are tax returns (roughly households) moving between U.S. counties; the IRS suppresses very small flows. Growth rates, per-1,000 figures, rent share and state ranks are BizyFi calculations. Data updated 2026-10-17. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.