Last official estimated population of Barnstable County was 215,903 (year 2014)[1]. This was 0.068% of total US population and 3.2% of total Massachusetts state population. Area of Barnstable County is 1,305.5 mi² (=3381.3 km²), in this year population density was 165.37 p/mi². If population growth rate would be same as in period 2010-2014 (+0%/yr), Barnstable County population in 2026 would be 215,948 [0].
Historical population of Barnstable 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] +1.06 %/yr
[1800-1810] +1.42 %/yr
[1810-1820] +0.79 %/yr
[1820-1830] +1.73 %/yr
[1830-1840] +1.33 %/yr
[1840-1850] +0.81 %/yr
[1850-1860] +0.2 %/yr
[1860-1870] -0.93 %/yr
[1870-1880] -0.27 %/yr
[1880-1890] -0.89 %/yr
[1890-1900] -0.47 %/yr
[1900-1910] -0.1 %/yr
[1910-1920] -0.32 %/yr
[1920-1930] +1.94 %/yr
[1930-1940] +1.45 %/yr
[1940-1950] +2.3 %/yr
[1950-1960] +4.15 %/yr
[1960-1970] +3.24 %/yr
[1970-1980] +4.35 %/yr
[1980-1990] +2.35 %/yr
[1990-2000] +1.76 %/yr
[2000-2005] -0.02 %/yr
[2005-2010] -0.56 %/yr
[2010-2014] +0 %/yr
Looking for settlements in Barnstable County? Visit this page: Settlements in Barnstable County, MA
Population of Barnstable County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 4199 | 4158 | 8,357 |
| 5 to 9 | 4599 | 4596 | 9,195 |
| 10 to 14 | 5093 | 4941 | 10,034 |
| 15 to 19 | 5813 | 5026 | 10,839 |
| 20 to 24 | 6080 | 5071 | 11,151 |
| 25 to 29 | 4777 | 4426 | 9,203 |
| 30 to 34 | 4809 | 4644 | 9,453 |
| 35 to 39 | 4381 | 4514 | 8,895 |
| 40 to 44 | 5136 | 5465 | 10,601 |
| 45 to 49 | 6277 | 7154 | 13,431 |
| 50 to 54 | 8016 | 9037 | 17,053 |
| 55 to 59 | 8586 | 9785 | 18,371 |
| 60 to 64 | 8485 | 9998 | 18,483 |
| 65 to 69 | 8568 | 9938 | 18,506 |
| 70 to 74 | 6395 | 7829 | 14,224 |
| 75 to 79 | 4554 | 5637 | 10,191 |
| 80 to 84 | 3415 | 4711 | 8,126 |
| 85+ | 3202 | 5599 | 8,801 |
Barnstable 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 | 99422 | 109720 | 209,142 |
| WAC | 97044 | 107363 | 204,407 |
| WA | 95363 | 105631 | 200,994 |
| NHWAC | 94520 | 104929 | 199,449 |
| NHWA | 93002 | 103337 | 196,339 |
| BAC | 3850 | 3545 | 7,395 |
| NHBAC | 3482 | 3236 | 6,718 |
| H | 2963 | 2809 | 5,772 |
| BA | 2908 | 2552 | 5,460 |
| NHBA | 2671 | 2350 | 5,021 |
| HWAC | 2524 | 2434 | 4,958 |
| HWA | 2361 | 2294 | 4,655 |
| AAC | 1890 | 2122 | 4,012 |
| NHAAC | 1848 | 2080 | 3,928 |
| TOM | 1853 | 1941 | 3,794 |
| NHTOM | 1672 | 1786 | 3,458 |
| AA | 1370 | 1584 | 2,954 |
| NHAA | 1346 | 1561 | 2,907 |
| IAC | 1424 | 1434 | 2,858 |
| NHIAC | 1231 | 1273 | 2,504 |
| IA | 818 | 764 | 1,582 |
| NHIA | 681 | 644 | 1,325 |
| HBAC | 368 | 309 | 677 |
| HBA | 237 | 202 | 439 |
| HIAC | 193 | 161 | 354 |
| HTOM | 181 | 155 | 336 |
| NAC | 159 | 147 | 306 |
| HIA | 137 | 120 | 257 |
| NHNAC | 126 | 116 | 242 |
| NA | 73 | 57 | 130 |
| NHNA | 50 | 42 | 92 |
| HAAC | 42 | 42 | 84 |
| HNAC | 33 | 31 | 64 |
| HAA | 24 | 23 | 47 |
| HNA | 23 | 15 | 38 |
• Essex County population
67.2 mi, 
330°
• Suffolk County
55.5 mi, 
311°
• Norfolk County
56.1 mi, 
297°
• Providence County
70.6 mi, 
273°
• Bristol County
45.5 mi, 265°
• Plymouth County
30.2 mi, 295°
• Newport County
59 mi, 
249°
• Bristol County
56 mi, 
263°
• Dukes County
38.4 mi, 
221°
• Nantucket County
34.2 mi, 
174°
[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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