Last official estimated population of Hancock County was 11,305 (year 2014)[1]. This was 0.004% of total US population and 0.4% of total Iowa state population. Area of Hancock County is 573.0 mi² (=1484.2 km²), in this year population density was 19.73 p/mi². If population growth rate would be same as in period 2010-2014 (-0.08%/yr), Hancock County population in 2025 would be 11,207 [0].
Historical population of Hancock County for period 1860-2014 [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
[1860-1870] +18.76 %/yr
[1870-1880] +13.2 %/yr
[1880-1890] +8.24 %/yr
[1890-1900] +6.08 %/yr
[1900-1910] -0.77 %/yr
[1910-1920] +1.46 %/yr
[1920-1930] +0.05 %/yr
[1930-1940] +0.4 %/yr
[1940-1950] -0.21 %/yr
[1950-1960] -0.32 %/yr
[1960-1970] -0.99 %/yr
[1970-1980] +0.45 %/yr
[1980-1990] -0.9 %/yr
[1990-2000] -0.43 %/yr
[2000-2005] -0.46 %/yr
[2005-2010] -0.85 %/yr
[2010-2014] -0.08 %/yr
Looking for settlements in Hancock County? Visit this page: Settlements in Hancock County, IA
Population of Hancock County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 284 | 308 | 592 |
| 5 to 9 | 364 | 342 | 706 |
| 10 to 14 | 401 | 331 | 732 |
| 15 to 19 | 393 | 325 | 718 |
| 20 to 24 | 260 | 237 | 497 |
| 25 to 29 | 245 | 246 | 491 |
| 30 to 34 | 351 | 294 | 645 |
| 35 to 39 | 303 | 310 | 613 |
| 40 to 44 | 293 | 283 | 576 |
| 45 to 49 | 307 | 295 | 602 |
| 50 to 54 | 448 | 460 | 908 |
| 55 to 59 | 465 | 443 | 908 |
| 60 to 64 | 438 | 372 | 810 |
| 65 to 69 | 319 | 308 | 627 |
| 70 to 74 | 235 | 231 | 466 |
| 75 to 79 | 196 | 233 | 429 |
| 80 to 84 | 122 | 181 | 303 |
| 85+ | 117 | 287 | 404 |
Hancock 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 |
| WAC | 5462 | 5390 | 10,852 |
| WA | 5408 | 5340 | 10,748 |
| NH | 5320 | 5318 | 10,638 |
| NHWAC | 5253 | 5230 | 10,483 |
| NHWA | 5200 | 5181 | 10,381 |
| H | 221 | 168 | 389 |
| HWAC | 209 | 160 | 369 |
| HWA | 208 | 159 | 367 |
| BAC | 51 | 69 | 120 |
| TOM | 58 | 52 | 110 |
| NHBAC | 45 | 65 | 110 |
| NHTOM | 55 | 51 | 106 |
| AAC | 47 | 39 | 86 |
| NHAAC | 45 | 39 | 84 |
| BA | 33 | 44 | 77 |
| IAC | 34 | 39 | 73 |
| NHBA | 27 | 41 | 68 |
| NHIAC | 29 | 35 | 64 |
| AA | 28 | 32 | 60 |
| NHAA | 28 | 32 | 60 |
| IA | 11 | 17 | 28 |
| NHIA | 8 | 13 | 21 |
| HBAC | 6 | 4 | 10 |
| HBA | 6 | 3 | 9 |
| NAC | 5 | 4 | 9 |
| HIAC | 5 | 4 | 9 |
| HIA | 3 | 4 | 7 |
| NHNAC | 3 | 3 | 6 |
| HTOM | 3 | 1 | 4 |
| NA | 3 | 1 | 4 |
| HNAC | 2 | 1 | 3 |
| NHNA | 2 | 0 | 2 |
| HAAC | 2 | 0 | 2 |
| HNA | 1 | 1 | 2 |
| HAA | 0 | 0 | 0 |
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[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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