Market insights · Washington
San Juan County, WA: growth, migration and housing
San Juan County has 18,577 residents, up 4.2% since 2020 (+0.1% in the last year). In 2022–2023, 580 households moved in and 570 moved out (+10 net), bringing in a net $12.9M of income. Median household income is $84,800, the median home $799,200 and median rent $1,512 a month.
In Washington: 21st of 39 counties for 5-year population growth · 31st of 39 counties for net in-migration (per resident) · 12th of 39 counties for median household income · 2nd of 39 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to San Juan County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| King County, WA | 117 | $21.5M |
| Whatcom County, WA | 46 | $4.3M |
| Snohomish County, WA | 25 | $1.7M |
| Skagit County, WA | 20 | $2.4M |
Where leavers went
Top counties by households leaving San Juan County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| King County, WA | 70 | $9.9M |
| Whatcom County, WA | 48 | $2.5M |
| Skagit County, WA | 41 | $3.4M |
| Snohomish County, WA | 29 | $2.3M |
BizyFi in San Juan County
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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.