Market insights · Missouri
Jefferson County, MO: growth, migration and housing
Jefferson County has 233,132 residents, up 2.7% since 2020 (+0.4% in the last year). In 2022–2023, 5,591 households moved in and 4,981 moved out (+610 net), bringing in a net $55.2M of income. Median household income is $82,851, the median home $237,200 and median rent $979 a month.
In Missouri: 44th of 115 counties for 5-year population growth · 30th of 115 counties for net in-migration (per resident) · 8th of 115 counties for median household income · 12th of 115 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Jefferson County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| St. Louis County, MO | 2,205 | $143.3M |
| St. Louis city, MO | 508 | $28.8M |
| St. Charles County, MO | 283 | $17.4M |
| St. Francois County, MO | 227 | $10.3M |
| Franklin County, MO | 219 | $10.3M |
| St. Clair County, IL | 126 | $7.5M |
| Washington County, MO | 95 | $4.0M |
| Ste. Genevieve County, MO | 80 | $4.4M |
Where leavers went
Top counties by households leaving Jefferson County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| St. Louis County, MO | 1,779 | $102.8M |
| St. Louis city, MO | 351 | $17.2M |
| Franklin County, MO | 283 | $14.5M |
| St. Francois County, MO | 266 | $12.6M |
| St. Charles County, MO | 253 | $15.5M |
| Madison County, IL | 94 | $4.6M |
| Washington County, MO | 93 | $4.3M |
| St. Clair County, IL | 83 | $5.0M |
BizyFi in Jefferson 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.