Market insights · Idaho
Cassia County, ID: growth, migration and housing
Cassia County has 26,397 residents, up 6.6% since 2020 (+0.7% in the last year). In 2022–2023, 599 households moved in and 745 moved out (-146 net), while a net $5.3M of income left. Median household income is $70,830, the median home $284,600 and median rent $1,000 a month.
In Idaho: 26th of 44 counties for 5-year population growth · 40th of 43 counties for net in-migration (per resident) · 18th of 44 counties for median household income · 30th of 44 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Cassia County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Minidoka County, ID | 226 | $13.2M |
| Twin Falls County, ID | 65 | $3.0M |
Where leavers went
Top counties by households leaving Cassia County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Minidoka County, ID | 257 | $12.4M |
| Twin Falls County, ID | 98 | $4.9M |
| Ada County, ID | 33 | $1.5M |
| Utah County, UT | 23 | $1.3M |
| Bannock County, ID | 22 | $0.9M |
| Canyon County, ID | 20 | $1.4M |
BizyFi in Cassia 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.