Last official estimated population of Calhoun County was 10,162 (year 2014)[1]. This was 0.003% of total US population and 0.3% of total Iowa state population. Area of Calhoun County is 572.1 mi² (=1481.8 km²), in this year population density was 17.76 p/mi². If population growth rate would be same as in period 2010-2014 (+1.25%/yr), Calhoun County population in 2024 would be 11,504 [0].
Historical population of Calhoun 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] +26.98 %/yr
[1870-1880] +13.32 %/yr
[1880-1890] +8.89 %/yr
[1890-1900] +3.54 %/yr
[1900-1910] -0.83 %/yr
[1910-1920] +0.4 %/yr
[1920-1930] -0.1 %/yr
[1930-1940] -0.01 %/yr
[1940-1950] -0.38 %/yr
[1950-1960] -0.61 %/yr
[1960-1970] -1.08 %/yr
[1970-1980] -0.53 %/yr
[1980-1990] -1.61 %/yr
[1990-2000] -0.35 %/yr
[2000-2005] -1.65 %/yr
[2005-2010] -1.12 %/yr
[2010-2014] +1.25 %/yr
Looking for settlements in Calhoun County? Visit this page: Settlements in Calhoun County, IA
Population of Calhoun County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 272 | 283 | 555 |
| 5 to 9 | 281 | 285 | 566 |
| 10 to 14 | 290 | 265 | 555 |
| 15 to 19 | 326 | 245 | 571 |
| 20 to 24 | 330 | 218 | 548 |
| 25 to 29 | 307 | 220 | 527 |
| 30 to 34 | 269 | 250 | 519 |
| 35 to 39 | 286 | 223 | 509 |
| 40 to 44 | 288 | 219 | 507 |
| 45 to 49 | 283 | 283 | 566 |
| 50 to 54 | 377 | 328 | 705 |
| 55 to 59 | 409 | 399 | 808 |
| 60 to 64 | 387 | 342 | 729 |
| 65 to 69 | 276 | 291 | 567 |
| 70 to 74 | 219 | 224 | 443 |
| 75 to 79 | 187 | 256 | 443 |
| 80 to 84 | 123 | 193 | 316 |
| 85+ | 157 | 275 | 432 |
Calhoun 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 | 4952 | 4717 | 9,669 |
| WAC | 4858 | 4743 | 9,601 |
| WA | 4807 | 4706 | 9,513 |
| NHWAC | 4747 | 4665 | 9,412 |
| NHWA | 4699 | 4632 | 9,331 |
| BAC | 198 | 44 | 242 |
| NHBAC | 194 | 41 | 235 |
| H | 115 | 82 | 197 |
| BA | 167 | 25 | 192 |
| NHBA | 165 | 25 | 190 |
| HWAC | 111 | 78 | 189 |
| HWA | 108 | 74 | 182 |
| TOM | 52 | 40 | 92 |
| NHTOM | 49 | 35 | 84 |
| IAC | 34 | 30 | 64 |
| NHIAC | 33 | 26 | 59 |
| AAC | 29 | 23 | 52 |
| NHAAC | 27 | 19 | 46 |
| IA | 21 | 16 | 37 |
| NHIA | 21 | 15 | 36 |
| AA | 20 | 12 | 32 |
| NHAA | 18 | 10 | 28 |
| HTOM | 3 | 5 | 8 |
| HBAC | 4 | 3 | 7 |
| HAAC | 2 | 4 | 6 |
| HIAC | 1 | 4 | 5 |
| HAA | 2 | 2 | 4 |
| NAC | 2 | 1 | 3 |
| NHNAC | 2 | 1 | 3 |
| HBA | 2 | 0 | 2 |
| HIA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
• Webster County population
24.1 mi, 
82°
• Boone County
43.4 mi, 
123°
• Carroll County
26.6 mi, 
205°
• Buena Vista County
35.3 mi, 
314°
• Crawford County
44.9 mi, 
238°
• Sac County
23.6 mi, 
270°
• Humboldt County
35.4 mi, 
39°
• Greene County
27.1 mi, 
151°
• Pocahontas County
24.1 mi, 
355°
• Ida County
44.1 mi, 270°
[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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