Market insights · New Hampshire
Belknap County, NH: growth, migration and housing
Belknap County has 65,147 residents, up 2.1% since 2020 (-0.0% in the last year). In 2022–2023, 2,328 households moved in and 2,139 moved out (+189 net), bringing in a net $131.3M of income. Median household income is $92,783, the median home $374,900 and median rent $1,167 a month.
In New Hampshire: 8th of 10 counties for 5-year population growth · 3rd of 10 counties for net in-migration (per resident) · 4th of 10 counties for median household income · 4th of 10 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Belknap County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Merrimack County, NH | 396 | $26.9M |
| Hillsborough County, NH | 248 | $28.6M |
| Middlesex County, MA | 155 | $36.9M |
| Grafton County, NH | 151 | $9.3M |
| Rockingham County, NH | 146 | $18.8M |
| Strafford County, NH | 132 | $8.5M |
| Essex County, MA | 92 | $53.8M |
| Carroll County, NH | 80 | $4.6M |
Where leavers went
Top counties by households leaving Belknap County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Merrimack County, NH | 424 | $24.9M |
| Hillsborough County, NH | 204 | $20.4M |
| Grafton County, NH | 157 | $10.3M |
| Carroll County, NH | 137 | $13.9M |
| Strafford County, NH | 118 | $5.9M |
| Rockingham County, NH | 107 | $9.7M |
| Middlesex County, MA | 68 | $8.9M |
| Essex County, MA | 42 | $5.1M |
BizyFi in Belknap County
Fewer than 3 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.