Market insights · Washington
Snohomish County, WA: growth, migration and housing
Snohomish County has 870,656 residents, up 4.9% since 2020 (+1.1% in the last year). In 2022–2023, 23,331 households moved in and 21,881 moved out (+1,450 net), bringing in a net $261.2M of income. Median household income is $111,246, the median home $696,000 and median rent $1,949 a month.
In Washington: 16th of 39 counties for 5-year population growth · 24th of 39 counties for net in-migration (per resident) · 2nd of 39 counties for median household income · 3rd of 39 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Snohomish County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| King County, WA | 10,534 | $1347.5M |
| Pierce County, WA | 637 | $41.3M |
| Skagit County, WA | 607 | $40.9M |
| Whatcom County, WA | 470 | $27.4M |
| Island County, WA | 462 | $32.3M |
| Los Angeles County, CA | 376 | $27.5M |
| Maricopa County, AZ | 354 | $26.5M |
| San Diego County, CA | 257 | $18.9M |
Where leavers went
Top counties by households leaving Snohomish County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| King County, WA | 7,334 | $710.3M |
| Pierce County, WA | 808 | $61.6M |
| Skagit County, WA | 706 | $55.9M |
| Maricopa County, AZ | 624 | $70.9M |
| Island County, WA | 527 | $57.4M |
| Whatcom County, WA | 514 | $33.6M |
| Spokane County, WA | 346 | $25.4M |
| Kitsap County, WA | 324 | $26.3M |
BizyFi in Snohomish 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.