Market insights · Ohio
Mercer County, OH: growth, migration and housing
Mercer County has 42,737 residents, up 0.5% since 2020 (+0.5% in the last year). In 2022–2023, 609 households moved in and 746 moved out (-137 net), while a net $4.4M of income left. Median household income is $76,782, the median home $210,600 and median rent $804 a month.
In Ohio: 30th of 88 counties for 5-year population growth · 85th of 88 counties for net in-migration (per resident) · 17th of 88 counties for median household income · 26th of 88 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Mercer County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Auglaize County, OH | 146 | $6.7M |
| Darke County, OH | 47 | $2.7M |
| Van Wert County, OH | 47 | $2.1M |
| Franklin County, OH | 29 | $2.5M |
| Jay County, IN | 25 | $1.1M |
| Allen County, OH | 25 | $0.9M |
Where leavers went
Top counties by households leaving Mercer County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Auglaize County, OH | 150 | $8.2M |
| Van Wert County, OH | 54 | $2.5M |
| Darke County, OH | 47 | $2.7M |
| Franklin County, OH | 44 | $2.1M |
| Allen County, OH | 39 | $1.0M |
| Hamilton County, OH | 20 | $0.9M |
BizyFi in Mercer 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.