Last official estimated population of Chickasaw County was 12,414 (year 2014)[1]. This was 0.004% of total US population and 0.4% of total Iowa state population. Area of Chickasaw County is 505.7 mi² (=1309.6 km²), in this year population density was 24.55 p/mi². If population growth rate would be same as in period 2010-2014 (-0.05%/yr), Chickasaw County population in 2024 would be 12,352 [0].
Historical population of Chickasaw 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] +8.91 %/yr
[1870-1880] +3.62 %/yr
[1880-1890] +0.33 %/yr
[1890-1900] +1.27 %/yr
[1900-1910] -1.02 %/yr
[1910-1920] +0.04 %/yr
[1920-1930] -0.53 %/yr
[1930-1940] +0.4 %/yr
[1940-1950] +0 %/yr
[1950-1960] -0.13 %/yr
[1960-1970] -0.04 %/yr
[1970-1980] +0.31 %/yr
[1980-1990] -1.48 %/yr
[1990-2000] -0.15 %/yr
[2000-2005] -0.83 %/yr
[2005-2010] -0.2 %/yr
[2010-2014] -0.05 %/yr
Looking for settlements in Chickasaw County? Visit this page: Settlements in Chickasaw County, IA
Population of Chickasaw County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 353 | 391 | 744 |
| 5 to 9 | 433 | 411 | 844 |
| 10 to 14 | 425 | 418 | 843 |
| 15 to 19 | 416 | 347 | 763 |
| 20 to 24 | 357 | 315 | 672 |
| 25 to 29 | 265 | 258 | 523 |
| 30 to 34 | 347 | 331 | 678 |
| 35 to 39 | 296 | 299 | 595 |
| 40 to 44 | 333 | 291 | 624 |
| 45 to 49 | 376 | 378 | 754 |
| 50 to 54 | 495 | 456 | 951 |
| 55 to 59 | 537 | 481 | 1,018 |
| 60 to 64 | 437 | 433 | 870 |
| 65 to 69 | 329 | 335 | 664 |
| 70 to 74 | 253 | 303 | 556 |
| 75 to 79 | 200 | 242 | 442 |
| 80 to 84 | 136 | 171 | 307 |
| 85+ | 143 | 273 | 416 |
Chickasaw 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 | 6068 | 6060 | 12,128 |
| WA | 6022 | 6031 | 12,053 |
| NH | 5981 | 6004 | 11,985 |
| NHWAC | 5930 | 5945 | 11,875 |
| NHWA | 5886 | 5916 | 11,802 |
| H | 150 | 129 | 279 |
| HWAC | 138 | 115 | 253 |
| HWA | 136 | 115 | 251 |
| BAC | 63 | 56 | 119 |
| NHBAC | 54 | 46 | 100 |
| TOM | 47 | 34 | 81 |
| NHTOM | 45 | 34 | 79 |
| BA | 38 | 35 | 73 |
| AAC | 23 | 33 | 56 |
| NHBA | 30 | 25 | 55 |
| NHAAC | 23 | 32 | 55 |
| IAC | 26 | 18 | 44 |
| AA | 15 | 25 | 40 |
| NHAA | 15 | 24 | 39 |
| NHIAC | 21 | 15 | 36 |
| HBAC | 9 | 10 | 19 |
| HBA | 8 | 10 | 18 |
| IA | 9 | 8 | 17 |
| NHIA | 5 | 5 | 10 |
| HIAC | 5 | 3 | 8 |
| HIA | 4 | 3 | 7 |
| HTOM | 2 | 0 | 2 |
| NAC | 1 | 1 | 2 |
| NHNAC | 1 | 1 | 2 |
| HAAC | 0 | 1 | 1 |
| HAA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
• Black Hawk County population
40.6 mi, 
179°
• Cerro Gordo County
47.1 mi, 
271°
• Bremer County
19.3 mi, 181°
• Winneshiek County
28.5 mi, 
55°
• Fayette County
27.6 mi, 
119°
• Fillmore County
44.2 mi, 
14°
• Floyd County
23.7 mi, 268°
• Butler County
32.5 mi, 
226°
• Mitchell County
30.9 mi, 
310°
• Howard County
21.1 mi, 
359°
[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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