Last official estimated population of Rockingham County was 295,306 (year 2014)[1]. This was 0.093% of total US population and 22.2% of total New Hampshire state population. Area of Rockingham County is 795.1 mi² (=2059.3 km²), in this year population density was 371.40 p/mi². If population growth rate would be same as in period 2010-2014 (+0.01%/yr), Rockingham County population in 2025 would be 295,534 [0].
Historical population of Rockingham County for period 1790-2014 [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
[1790-1800] +0.51 %/yr
[1800-1810] +1 %/yr
[1810-1820] +0.97 %/yr
[1820-1830] -2.18 %/yr
[1830-1840] +0.32 %/yr
[1840-1850] +0.72 %/yr
[1850-1860] +0.19 %/yr
[1860-1870] -0.58 %/yr
[1870-1880] +0.37 %/yr
[1880-1890] +0.12 %/yr
[1890-1900] +0.29 %/yr
[1900-1910] +0.21 %/yr
[1910-1920] +0.06 %/yr
[1920-1930] +0.24 %/yr
[1930-1940] +0.79 %/yr
[1940-1950] +1.88 %/yr
[1950-1960] +3.52 %/yr
[1960-1970] +3.45 %/yr
[1970-1980] +3.2 %/yr
[1980-1990] +2.59 %/yr
[1990-2000] +1.21 %/yr
[2000-2005] +0.98 %/yr
[2005-2010] +0.28 %/yr
[2010-2014] +0.01 %/yr
Looking for settlements in Rockingham County? Visit this page: Settlements in Rockingham County, NH
Population of Rockingham County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 6932 | 6809 | 13,741 |
| 5 to 9 | 8315 | 8171 | 16,486 |
| 10 to 14 | 9907 | 9439 | 19,346 |
| 15 to 19 | 9916 | 9218 | 19,134 |
| 20 to 24 | 8899 | 7950 | 16,849 |
| 25 to 29 | 8847 | 8158 | 17,005 |
| 30 to 34 | 8125 | 8058 | 16,183 |
| 35 to 39 | 7955 | 8300 | 16,255 |
| 40 to 44 | 10176 | 10649 | 20,825 |
| 45 to 49 | 12054 | 12523 | 24,577 |
| 50 to 54 | 13767 | 14091 | 27,858 |
| 55 to 59 | 12901 | 12901 | 25,802 |
| 60 to 64 | 10232 | 10491 | 20,723 |
| 65 to 69 | 8040 | 8619 | 16,659 |
| 70 to 74 | 5293 | 5705 | 10,998 |
| 75 to 79 | 3341 | 3982 | 7,323 |
| 80 to 84 | 2269 | 3062 | 5,331 |
| 85+ | 1846 | 3680 | 5,526 |
Rockingham 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 | 144907 | 147916 | 292,823 |
| WAC | 144119 | 147125 | 291,244 |
| WA | 142057 | 145168 | 287,225 |
| NHWAC | 140657 | 143595 | 284,252 |
| NHWA | 138738 | 141780 | 280,518 |
| H | 3908 | 3890 | 7,798 |
| AAC | 3441 | 3921 | 7,362 |
| NHAAC | 3342 | 3825 | 7,167 |
| HWAC | 3462 | 3530 | 6,992 |
| HWA | 3319 | 3388 | 6,707 |
| AA | 2638 | 3151 | 5,789 |
| NHAA | 2571 | 3098 | 5,669 |
| TOM | 2128 | 2013 | 4,141 |
| BAC | 2312 | 1796 | 4,108 |
| NHTOM | 1967 | 1860 | 3,827 |
| NHBAC | 1948 | 1508 | 3,456 |
| BA | 1627 | 1130 | 2,757 |
| NHBA | 1354 | 926 | 2,280 |
| IAC | 1090 | 996 | 2,086 |
| NHIAC | 947 | 857 | 1,804 |
| HBAC | 364 | 288 | 652 |
| IA | 307 | 266 | 573 |
| HBA | 273 | 204 | 477 |
| NHIA | 234 | 189 | 423 |
| HTOM | 161 | 153 | 314 |
| HIAC | 143 | 139 | 282 |
| NAC | 140 | 130 | 270 |
| NHNAC | 109 | 111 | 220 |
| HAAC | 99 | 96 | 195 |
| HIA | 73 | 77 | 150 |
| NA | 58 | 78 | 136 |
| HAA | 67 | 53 | 120 |
| NHNA | 43 | 63 | 106 |
| HNAC | 31 | 19 | 50 |
| HNA | 15 | 15 | 30 |
• Middlesex County population
38.1 mi, 
203°
• Essex County
26.7 mi, 
153°
• Suffolk County
45.5 mi, 
174°
• Norfolk County
56.6 mi, 
184°
• Hillsborough County
32 mi, 
260°
• York County
37.2 mi, 
35°
• Merrimack County
36.3 mi, 
306°
• Strafford County
21.3 mi, 
8°
• Cheshire County
58.3 mi, 
265°
• Belknap County
40.2 mi, 
335°
[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
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