Market insights · New Hampshire
Hillsborough County, NH: growth, migration and housing
Hillsborough County has 433,415 residents, up 2.5% since 2020 (+0.7% in the last year). In 2022–2023, 11,676 households moved in and 11,611 moved out (+65 net), while a net $10.5M of income left. Median household income is $103,545, the median home $421,100 and median rent $1,623 a month.
In New Hampshire: 5th of 10 counties for 5-year population growth · 10th of 10 counties for net in-migration (per resident) · 2nd of 10 counties for median household income · 2nd of 10 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Hillsborough County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Middlesex County, MA | 2,099 | $212.5M |
| Rockingham County, NH | 1,708 | $130.5M |
| Merrimack County, NH | 1,059 | $71.5M |
| Essex County, MA | 659 | $49.4M |
| Worcester County, MA | 348 | $32.6M |
| Suffolk County, MA | 304 | $32.4M |
| Cheshire County, NH | 255 | $19.3M |
| Strafford County, NH | 219 | $16.6M |
Where leavers went
Top counties by households leaving Hillsborough County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Rockingham County, NH | 1,656 | $154.2M |
| Merrimack County, NH | 1,362 | $135.0M |
| Middlesex County, MA | 1,149 | $89.9M |
| Essex County, MA | 422 | $37.3M |
| Cheshire County, NH | 330 | $21.2M |
| Strafford County, NH | 291 | $19.6M |
| Suffolk County, MA | 284 | $20.5M |
| Belknap County, NH | 248 | $28.6M |
BizyFi in Hillsborough County
4 companies in the BizyFi directory are based here. Search them on the company map (company names with a free account), or browse New Hampshire 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.