Market insights · New Jersey
Mercer County, NJ: growth, migration and housing
Mercer County has 399,289 residents, up 3.3% since 2020 (+0.5% in the last year). In 2022–2023, 8,613 households moved in and 10,352 moved out (-1,739 net), while a net $250.2M of income left. Median household income is $100,645, the median home $377,700 and median rent $1,623 a month.
In New Jersey: 6th of 21 counties for 5-year population growth · 20th of 21 counties for net in-migration (per resident) · 12th of 21 counties for median household income · 13th of 21 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) |
|---|---|---|
| Middlesex County, NJ | 1,342 | $136.6M |
| Burlington County, NJ | 662 | $40.4M |
| Bucks County, PA | 452 | $36.7M |
| Somerset County, NJ | 428 | $54.2M |
| Monmouth County, NJ | 290 | $27.6M |
| Hudson County, NJ | 271 | $42.1M |
| Ocean County, NJ | 267 | $20.7M |
| Kings County, NY | 244 | $24.9M |
Where leavers went
Top counties by households leaving Mercer County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Burlington County, NJ | 1,299 | $92.4M |
| Middlesex County, NJ | 957 | $98.1M |
| Bucks County, PA | 670 | $74.3M |
| New York County, NY | 346 | $60.6M |
| Philadelphia County, PA | 342 | $19.4M |
| Somerset County, NJ | 327 | $43.5M |
| Monmouth County, NJ | 301 | $35.4M |
| Ocean County, NJ | 288 | $32.7M |
BizyFi in Mercer County
8 companies in the BizyFi directory are based here. Search them on the company map (company names with a free account), or browse New Jersey 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.