Last official estimated population of Sullivan County was 43,720 (year 2014)[1]. This was 0.014% of total US population and 3.3% of total New Hampshire state population. Area of Sullivan County is 552.0 mi² (=1429.7 km²), in this year population density was 79.20 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Sullivan County population in 2024 would be 43,665 [0].
Historical population of Sullivan County for period 1830-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position
[1830-1840] +0.34 %/yr
[1840-1850] -0.48 %/yr
[1850-1860] -0.17 %/yr
[1860-1870] -0.53 %/yr
[1870-1880] +0.06 %/yr
[1880-1890] -0.48 %/yr
[1890-1900] +0.4 %/yr
[1900-1910] +0.71 %/yr
[1910-1920] +0.79 %/yr
[1920-1930] +1.5 %/yr
[1930-1940] +0.47 %/yr
[1940-1950] +0.39 %/yr
[1950-1960] +0.6 %/yr
[1960-1970] +0.98 %/yr
[1970-1980] +1.54 %/yr
[1980-1990] +0.68 %/yr
[1990-2000] +0.47 %/yr
[2000-2005] +1.2 %/yr
[2005-2010] +0.38 %/yr
[2010-2014] -0.01 %/yr
Looking for settlements in Sullivan County? Visit this page: Settlements in Sullivan County, NH
Population of Sullivan County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 1028 | 1015 | 2,043 |
| 5 to 9 | 1203 | 1109 | 2,312 |
| 10 to 14 | 1261 | 1256 | 2,517 |
| 15 to 19 | 1276 | 1156 | 2,432 |
| 20 to 24 | 1136 | 1119 | 2,255 |
| 25 to 29 | 1095 | 1100 | 2,195 |
| 30 to 34 | 1195 | 1158 | 2,353 |
| 35 to 39 | 1114 | 1188 | 2,302 |
| 40 to 44 | 1378 | 1335 | 2,713 |
| 45 to 49 | 1569 | 1575 | 3,144 |
| 50 to 54 | 1772 | 1810 | 3,582 |
| 55 to 59 | 1854 | 1859 | 3,713 |
| 60 to 64 | 1653 | 1726 | 3,379 |
| 65 to 69 | 1407 | 1454 | 2,861 |
| 70 to 74 | 972 | 1035 | 2,007 |
| 75 to 79 | 628 | 689 | 1,317 |
| 80 to 84 | 402 | 542 | 944 |
| 85+ | 332 | 702 | 1,034 |
Sullivan County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| NH | 20961 | 21516 | 42,477 |
| WAC | 20907 | 21388 | 42,295 |
| NHWAC | 20627 | 21112 | 41,739 |
| WA | 20599 | 21074 | 41,673 |
| NHWA | 20345 | 20819 | 41,164 |
| TOM | 316 | 328 | 644 |
| H | 314 | 312 | 626 |
| NHTOM | 288 | 306 | 594 |
| HWAC | 280 | 276 | 556 |
| IAC | 254 | 270 | 524 |
| HWA | 254 | 255 | 509 |
| BAC | 250 | 253 | 503 |
| NHIAC | 232 | 240 | 472 |
| NHBAC | 217 | 227 | 444 |
| AAC | 173 | 254 | 427 |
| NHAAC | 169 | 250 | 419 |
| AA | 117 | 193 | 310 |
| NHAA | 117 | 192 | 309 |
| BA | 158 | 150 | 308 |
| NHBA | 139 | 134 | 273 |
| IA | 78 | 78 | 156 |
| NHIA | 65 | 61 | 126 |
| HBAC | 33 | 26 | 59 |
| HIAC | 22 | 30 | 52 |
| HTOM | 28 | 22 | 50 |
| NAC | 19 | 18 | 37 |
| HBA | 19 | 16 | 35 |
| NHNAC | 15 | 17 | 32 |
| HIA | 13 | 17 | 30 |
| NA | 7 | 5 | 12 |
| NHNA | 7 | 4 | 11 |
| HAAC | 4 | 4 | 8 |
| HNAC | 4 | 1 | 5 |
| HNA | 0 | 1 | 1 |
| HAA | 0 | 1 | 1 |
• Hillsborough County population
40 mi, 
140°
• Merrimack County
27.6 mi, 
98°
• Grafton County
43.4 mi, 
25°
• Cheshire County
30.1 mi, 
182°
• Rutland County
43.6 mi, 
290°
• Belknap County
41.4 mi, 
74°
• Windsor County
23.9 mi, 
307°
• Windham County
35.7 mi, 
224°
• Bennington County
50.1 mi, 
243°
• Orange County
45 mi, 
350°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
*Cheshire New Hampshire Notes
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