Last official estimated population of Hancock County was 19,093 (year 2014)[1]. This was 0.006% of total US population and 0.1% of total Illinois state population. Area of Hancock County is 814.4 mi² (=2109.3 km²), in this year population density was 23.44 p/mi². If population growth rate would be same as in period 2010-2014 (-0.01%/yr), Hancock County population in 2026 would be 19,060 [0].
Historical population of Hancock 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] +35.32 %/yr
[1840-1850] +3.95 %/yr
[1850-1860] +7.09 %/yr
[1860-1870] +2.15 %/yr
[1870-1880] -0.17 %/yr
[1880-1890] -1.02 %/yr
[1890-1900] +0.1 %/yr
[1900-1910] -0.5 %/yr
[1910-1920] -0.71 %/yr
[1920-1930] -0.76 %/yr
[1930-1940] -0.05 %/yr
[1940-1950] -0.19 %/yr
[1950-1960] -0.48 %/yr
[1960-1970] -0.38 %/yr
[1970-1980] +0.1 %/yr
[1980-1990] -1.1 %/yr
[1990-2000] -0.58 %/yr
[2000-2005] -0.7 %/yr
[2005-2010] -0.39 %/yr
[2010-2014] -0.01 %/yr
Looking for settlements in Hancock County? Visit this page: Settlements in Hancock County, IL
Population of Hancock County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 501 | 429 | 930 |
| 5 to 9 | 566 | 528 | 1,094 |
| 10 to 14 | 552 | 553 | 1,105 |
| 15 to 19 | 534 | 490 | 1,024 |
| 20 to 24 | 497 | 455 | 952 |
| 25 to 29 | 427 | 430 | 857 |
| 30 to 34 | 497 | 484 | 981 |
| 35 to 39 | 500 | 478 | 978 |
| 40 to 44 | 514 | 481 | 995 |
| 45 to 49 | 572 | 565 | 1,137 |
| 50 to 54 | 707 | 705 | 1,412 |
| 55 to 59 | 745 | 746 | 1,491 |
| 60 to 64 | 642 | 671 | 1,313 |
| 65 to 69 | 634 | 658 | 1,292 |
| 70 to 74 | 454 | 563 | 1,017 |
| 75 to 79 | 381 | 416 | 797 |
| 80 to 84 | 242 | 323 | 565 |
| 85+ | 211 | 413 | 624 |
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 | 9067 | 9286 | 18,353 |
| NH | 9030 | 9262 | 18,292 |
| WA | 9006 | 9194 | 18,200 |
| NHWAC | 8929 | 9169 | 18,098 |
| NHWA | 8872 | 9079 | 17,951 |
| H | 146 | 126 | 272 |
| HWAC | 138 | 117 | 255 |
| HWA | 134 | 115 | 249 |
| TOM | 66 | 98 | 164 |
| NHTOM | 62 | 96 | 158 |
| BAC | 71 | 78 | 149 |
| NHBAC | 68 | 75 | 143 |
| IAC | 44 | 68 | 112 |
| NHIAC | 36 | 61 | 97 |
| AAC | 47 | 47 | 94 |
| NHAAC | 46 | 47 | 93 |
| BA | 45 | 29 | 74 |
| NHBA | 45 | 27 | 72 |
| AA | 31 | 29 | 60 |
| NHAA | 30 | 29 | 59 |
| IA | 21 | 31 | 52 |
| NHIA | 14 | 25 | 39 |
| NAC | 13 | 9 | 22 |
| NHNAC | 13 | 8 | 21 |
| HIAC | 8 | 7 | 15 |
| NA | 7 | 7 | 14 |
| HIA | 7 | 6 | 13 |
| NHNA | 7 | 6 | 13 |
| HTOM | 4 | 2 | 6 |
| HBAC | 3 | 3 | 6 |
| HBA | 0 | 2 | 2 |
| HAAC | 1 | 0 | 1 |
| HAA | 1 | 0 | 1 |
| HNAC | 0 | 1 | 1 |
| HNA | 0 | 1 | 1 |
• Adams County population
29 mi, 
182°
• Des Moines County
35.2 mi, 
358°
• Lee County
23.3 mi, 
315°
• McDonough County
25.9 mi, 
82°
• Warren County
42.1 mi, 
43°
• Lewis County
37 mi, 
233°
• Schuyler County
33.9 mi, 
120°
• Henderson County
30.6 mi, 
22°
• Clark County
29.5 mi, 
270°
• Brown County
37.8 mi, 
144°
[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
*Madison Illinois Notes
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