Market insights · Missouri
Warren County, MO: growth, migration and housing
Warren County has 39,016 residents, up 9.2% since 2020 (+1.3% in the last year). In 2022–2023, 1,324 households moved in and 1,088 moved out (+236 net), bringing in a net $14.2M of income. Median household income is $81,209, the median home $260,400 and median rent $995 a month.
In Missouri: 3rd of 115 counties for 5-year population growth · 6th of 115 counties for net in-migration (per resident) · 9th of 115 counties for median household income · 9th of 115 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Warren County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| St. Charles County, MO | 545 | $35.8M |
| Lincoln County, MO | 154 | $8.6M |
| St. Louis County, MO | 113 | $7.5M |
| Franklin County, MO | 73 | $4.1M |
| Montgomery County, MO | 52 | $2.2M |
| Jefferson County, MO | 29 | $1.2M |
| St. Louis city, MO | 21 | $1.0M |
Where leavers went
Top counties by households leaving Warren County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| St. Charles County, MO | 330 | $19.6M |
| Lincoln County, MO | 162 | $8.2M |
| St. Louis County, MO | 96 | $9.6M |
| Franklin County, MO | 82 | $4.4M |
| Montgomery County, MO | 56 | $2.6M |
| Jefferson County, MO | 20 | $1.2M |
BizyFi in Warren 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.