Market insights · New Hampshire
Sullivan County, NH: growth, migration and housing
Sullivan County has 43,961 residents, up 2.1% since 2020 (+0.1% in the last year). In 2022–2023, 1,344 households moved in and 1,198 moved out (+146 net), bringing in a net $27.8M of income. Median household income is $80,858, the median home $268,700 and median rent $1,211 a month.
In New Hampshire: 9th of 10 counties for 5-year population growth · 2nd of 10 counties for net in-migration (per resident) · 9th of 10 counties for median household income · 9th of 10 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Sullivan County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Grafton County, NH | 178 | $17.6M |
| Merrimack County, NH | 121 | $11.9M |
| Windsor County, VT | 115 | $6.4M |
| Hillsborough County, NH | 107 | $9.2M |
| Cheshire County, NH | 70 | $3.6M |
| Middlesex County, MA | 51 | $9.6M |
| Windham County, VT | 29 | $1.4M |
Where leavers went
Top counties by households leaving Sullivan County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Grafton County, NH | 124 | $10.7M |
| Windsor County, VT | 107 | $5.2M |
| Merrimack County, NH | 100 | $12.4M |
| Hillsborough County, NH | 69 | $4.0M |
| Cheshire County, NH | 67 | $4.3M |
| Middlesex County, MA | 30 | $2.7M |
| Windham County, VT | 20 | $1.0M |
BizyFi in Sullivan 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.