Market insights · Missouri
St. Louis County, MO: growth, migration and housing
St. Louis County has 990,911 residents, down 1.2% since 2020 (-0.1% in the last year). In 2022–2023, 22,969 households moved in and 25,289 moved out (-2,320 net), while a net $371.5M of income left. Median household income is $82,936, the median home $276,800 and median rent $1,209 a month.
In Missouri: 97th of 115 counties for 5-year population growth · 95th of 115 counties for net in-migration (per resident) · 7th of 115 counties for median household income · 5th of 115 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to St. Louis County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| St. Louis city, MO | 6,585 | $413.4M |
| St. Charles County, MO | 2,599 | $166.3M |
| Jefferson County, MO | 1,779 | $102.8M |
| St. Clair County, IL | 626 | $34.6M |
| Madison County, IL | 563 | $35.0M |
| Franklin County, MO | 344 | $25.2M |
| Cook County, IL | 316 | $44.7M |
| Boone County, MO | 286 | $16.5M |
Where leavers went
Top counties by households leaving St. Louis County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| St. Louis city, MO | 5,157 | $239.5M |
| St. Charles County, MO | 3,854 | $287.4M |
| Jefferson County, MO | 2,205 | $143.3M |
| St. Clair County, IL | 560 | $28.3M |
| Madison County, IL | 555 | $30.9M |
| Franklin County, MO | 533 | $58.0M |
| Cook County, IL | 512 | $43.6M |
| Dallas County, TX | 257 | $19.4M |
BizyFi in St. Louis County
13 companies in the BizyFi directory are based here. Search them on the company map (company names with a free account), or browse Missouri 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.