Market insights · Washington
Island County, WA: growth, migration and housing
Island County has 85,657 residents, down 1.5% since 2020 (-0.4% in the last year). In 2022–2023, 3,844 households moved in and 3,686 moved out (+158 net), bringing in a net $74.8M of income. Median household income is $90,551, the median home $593,300 and median rent $1,662 a month.
In Washington: 39th of 39 counties for 5-year population growth · 23rd of 39 counties for net in-migration (per resident) · 8th of 39 counties for median household income · 4th of 39 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Island County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Snohomish County, WA | 527 | $57.4M |
| King County, WA | 508 | $92.4M |
| Skagit County, WA | 208 | $14.8M |
| San Diego County, CA | 129 | $11.8M |
| Whatcom County, WA | 104 | $6.4M |
| Duval County, FL | 82 | $4.8M |
| Pierce County, WA | 68 | $4.9M |
| Escambia County, FL | 56 | $3.0M |
Where leavers went
Top counties by households leaving Island County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Snohomish County, WA | 462 | $32.3M |
| King County, WA | 307 | $41.0M |
| Skagit County, WA | 242 | $15.2M |
| Whatcom County, WA | 140 | $6.4M |
| San Diego County, CA | 101 | $6.9M |
| Maricopa County, AZ | 67 | $5.5M |
| Pierce County, WA | 66 | $5.0M |
| Virginia Beach city, VA | 61 | $3.3M |
BizyFi in Island 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.