Population 43,715 · Census ACS 2020–24
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Population and households in Sullivan County
Household size in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | 2.39 | 2.52 | 2.68 |
| 2010–14 | 2.43 | 2.50 | 2.73 |
| 2015–19 | 2.45 | 2.49 | 2.71 |
| 2020–24 | 2.64 | 2.51 | 2.65 |
| Change | +0.24 | −0.01 | −0.03 |
At 2.64 people per household, Sullivan County sits close to the national average of 2.65. The typical household here is bigger than in New Hampshire as a whole, where it has 2.51 people. Household size has climbed from 2.39 in 2006–10, even as the national average fell. No other New Hampshire county has larger households.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | 43.6 | 40.6 | 37.7 |
| 2010–14 | 45.4 | 42.1 | 38.6 |
| 2015–19 | 46.5 | 43.3 | 39.6 |
| 2020–24 | 47.4 | 44.2 | 40.1 |
| Change | +3.9 | +3.5 | +2.3 |
With a median age of 47.4, Sullivan County is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees. The median age has climbed from 43.6 in 2006–10, in line with the national trend. The youngest areas are in the southwest, the oldest in the northwest.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | 9.9% | 9.4% | 12.3% |
| 2010–14 | 11.1% | 9.5% | 12.3% |
| 2015–19 | 10.8% | 8.9% | 11.6% |
| 2020–24 | 8.8% | 8.5% | 11.6% |
| Change | −1.1 pts | −0.9 pts | −0.6 pts |
Single parents head about one in twelve households in Sullivan County (8.8%), below the national share of 11.6%. The single-parent share has edged down 1.1 points since 2006–10, as it has nationally. Among New Hampshire's ten counties, though, only one other has a higher share of single-parent households.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Sullivan County
Renters in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | 26.3% | 27.4% | 33.3% |
| 2010–14 | 25.2% | 29.0% | 35.6% |
| 2015–19 | 26.7% | 28.9% | 36.0% |
| 2020–24 | 24.6% | 27.2% | 34.8% |
| Change | −1.7 pts | −0.1 pts | +1.5 pts |
Sullivan County is largely a place of homeowners: only 24.6% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Nearly half of owners (46.5%) have paid off their mortgages, above the national share of 39.8%. The renter share is down 1.7 points from 2006–10, even as the national share rose.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | 16.9% | 12.6% | 11.4% |
| 2010–14 | 19.0% | 12.5% | 11.4% |
| 2015–19 | 21.0% | 12.7% | 11.1% |
| 2020–24 | 21.2% | 11.7% | 9.6% |
| Change | +4.3 pts | −0.9 pts | −1.8 pts |
Vacant homes make up 21.2% of the housing in Sullivan County, far above the national rate of 9.6%. In resort and lake areas that usually means seasonal and vacation homes; elsewhere it can point to weak demand. Vacancy is up 4.3 points from 2006–10, even as the national rate fell.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | 1966 | 1971 | 1974 |
| 2010–14 | 1967 | 1972 | 1975 |
| 2015–19 | 1968 | 1973 | 1977 |
| 2020–24 | 1970 | 1976 | 1980 |
| Change | +4 | +5 | +6 |
Sullivan County is a place of older homes: half were built before 1970, while the national median is 1980. That means established neighborhoods, and more houses that may need updating. Newer construction is concentrated in the northeast, while the west has the oldest housing. Of New Hampshire's ten counties, only two have older homes.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | $815 | $1,018 | $965 |
| 2010–14 | $971 | $1,094 | $1,040 |
| 2015–19 | $1,061 | $1,224 | $1,213 |
| 2020–24 | $1,317 | $1,597 | $1,571 |
| Change | +$502 | +$580 | +$606 |
Rent in Sullivan County runs $1,317 a month at the median, utilities included, below the U.S. median of $1,571. Rent has climbed $502 a month since 2006–10, up 62%, roughly in step with the nation. Rent takes 29.3% of the typical renter's income, just under the 30% mark often used to define affordable rent. Renters on a budget will find the lowest rents in the southwest; the highest are in the east.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Sullivan County
Bachelor's degrees in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | 26.6% | 33.5% | 28.4% |
| 2010–14 | 27.7% | 35.0% | 29.6% |
| 2015–19 | 28.4% | 37.6% | 32.1% |
| 2020–24 | 29.8% | 41.1% | 35.6% |
| Change | +3.2 pts | +7.6 pts | +7.2 pts |
College degrees are a little less common in Sullivan County than nationally: 29.8% of adults 25 and older have a bachelor's or higher, against 35.6%. Since 2006–10, the share with a degree has risen 3.2 points, mirroring the country. Only one other New Hampshire county has a lower share of college graduates.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | 90.0% | 91.0% | 84.9% |
| 2010–14 | 90.0% | 92.0% | 86.1% |
| 2015–19 | 91.3% | 93.1% | 87.7% |
| 2020–24 | 92.3% | 94.5% | 89.3% |
| Change | +2.3 pts | +3.5 pts | +4.3 pts |
About nine in ten adults in Sullivan County have finished high school (92.3%), a bit above the national rate of 89.3%. Even so, the rate is lower than in New Hampshire overall (94.5%). The share with a diploma is up 2.3 points from 2006–10, mirroring the country.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Sullivan County
| Period | Sullivan County | New Hampshire | U.S. |
|---|---|---|---|
| 2006–10 | 4.5% | 5.9% | 8.1% |
| 2010–14 | 7.1% | 6.6% | 9.4% |
| 2015–19 | 3.0% | 3.6% | 5.6% |
| 2020–24 | 3.4% | 3.4% | 5.4% |
| Change | −1.1 pts | −2.5 pts | −2.7 pts |
Jobs have been easier to find in Sullivan County than nationally: unemployment was 3.4%, against 5.4%. Since 2006–10, unemployment has edged down 1.1 points, in line with the national trend. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Sullivan County compared with nearby counties
| County | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Sullivan County | 2.64 | 47.4 | 8.8% | 24.6% | 21.2% | 1970 | $1,317 | 29.8% | 92.3% | 3.4% |
| Merrimack County | 2.49 | 43.1 | 8.1% | 26.5% | 8.4% | 1974 | $1,449 | 38.8% | 94.6% | 3.1% |
| Washington County | 2.39 | 45.8 | 9.7% | 23.4% | 13.8% | 1964 | $1,030 | 22.6% | 90.5% | 5.0% |
| Strafford County | 2.48 | 41.0 | 7.9% | 32.9% | 10.1% | 1977 | $1,557 | 40.7% | 95.1% | 3.5% |
| Warren County | 2.18 | 46.8 | 9.1% | 27.9% | 17.8% | 1971 | $1,224 | 36.7% | 93.3% | 4.5% |
| York County | 2.38 | 45.4 | 8.2% | 22.7% | 15.5% | 1977 | $1,432 | 36.4% | 95.5% | 3.4% |
| Oswego County | 2.42 | 41.6 | 13.6% | 26.6% | 12.0% | 1971 | $982 | 21.8% | 89.3% | 7.1% |
| Orleans County | 2.35 | 44.8 | 11.8% | 22.8% | 10.5% | 1955 | $888 | 18.3% | 87.1% | 5.3% |
| Sanilac County | 2.32 | 44.9 | 9.7% | 17.4% | 14.1% | 1971 | $803 | 16.2% | 90.1% | 5.9% |
| Tuscola County | 2.46 | 45.7 | 8.3% | 13.6% | 10.6% | 1968 | $920 | 16.6% | 92.7% | 6.0% |
| Saginaw County | 2.40 | 42.2 | 12.9% | 25.9% | 10.1% | 1969 | $1,004 | 24.3% | 91.7% | 6.7% |
All figures 2020–24.
Counties with similar populations: Campbell County, WY · Tioga County, PA · Chambers County, TX · Cayey Municipio, PR · Cass County, MI · Cass County, IN · Carter County, OK · Carroll County, NH · Caroline County, MD · Carlton County, MN
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Sullivan County. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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