Last official estimated population of Clarke County was 9,301 (year 2014)[1]. This was 0.003% of total US population and 0.3% of total Iowa state population. Area of Clarke County is 431.8 mi² (=1118.2 km²), in this year population density was 21.54 p/mi². If population growth rate would be same as in period 2010-2014 (+0.04%/yr), Clarke County population in 2026 would be 9,346 [0].
Historical population of Clarke County for period 1850-2014 [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
[1850-1860] +52.65 %/yr
[1860-1870] +4.87 %/yr
[1870-1880] +2.8 %/yr
[1880-1890] -0.16 %/yr
[1890-1900] +0.94 %/yr
[1900-1910] -1.46 %/yr
[1910-1920] -0.22 %/yr
[1920-1930] -0.12 %/yr
[1930-1940] -0.15 %/yr
[1940-1950] -0.88 %/yr
[1950-1960] -1.3 %/yr
[1960-1970] -0.81 %/yr
[1970-1980] +1.28 %/yr
[1980-1990] -0.38 %/yr
[1990-2000] +0.97 %/yr
[2000-2005] +0.11 %/yr
[2005-2010] +0.23 %/yr
[2010-2014] +0.04 %/yr
Looking for settlements in Clarke County? Visit this page: Settlements in Clarke County, IA
Population of Clarke County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 310 | 287 | 597 |
| 5 to 9 | 379 | 300 | 679 |
| 10 to 14 | 313 | 304 | 617 |
| 15 to 19 | 295 | 267 | 562 |
| 20 to 24 | 271 | 246 | 517 |
| 25 to 29 | 273 | 263 | 536 |
| 30 to 34 | 289 | 238 | 527 |
| 35 to 39 | 241 | 245 | 486 |
| 40 to 44 | 239 | 273 | 512 |
| 45 to 49 | 310 | 270 | 580 |
| 50 to 54 | 328 | 342 | 670 |
| 55 to 59 | 359 | 325 | 684 |
| 60 to 64 | 304 | 323 | 627 |
| 65 to 69 | 238 | 242 | 480 |
| 70 to 74 | 189 | 208 | 397 |
| 75 to 79 | 119 | 161 | 280 |
| 80 to 84 | 88 | 106 | 194 |
| 85+ | 85 | 187 | 272 |
Clarke 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 | 4524 | 4473 | 8,997 |
| WA | 4464 | 4420 | 8,884 |
| NH | 4037 | 4065 | 8,102 |
| NHWAC | 3968 | 3982 | 7,950 |
| NHWA | 3917 | 3940 | 7,857 |
| H | 593 | 522 | 1,115 |
| HWAC | 556 | 491 | 1,047 |
| HWA | 547 | 480 | 1,027 |
| BAC | 74 | 66 | 140 |
| TOM | 61 | 57 | 118 |
| NHBAC | 60 | 55 | 115 |
| IAC | 54 | 50 | 104 |
| NHTOM | 51 | 46 | 97 |
| AAC | 38 | 51 | 89 |
| BA | 48 | 39 | 87 |
| NHAAC | 35 | 47 | 82 |
| NHBA | 39 | 32 | 71 |
| IA | 34 | 29 | 63 |
| AA | 19 | 41 | 60 |
| HIAC | 30 | 25 | 55 |
| NHAA | 17 | 37 | 54 |
| NHIAC | 24 | 25 | 49 |
| HIA | 25 | 20 | 45 |
| HBAC | 14 | 11 | 25 |
| HTOM | 10 | 11 | 21 |
| NHIA | 9 | 9 | 18 |
| HBA | 9 | 7 | 16 |
| NAC | 5 | 5 | 10 |
| NHNAC | 5 | 3 | 8 |
| HAAC | 3 | 4 | 7 |
| HAA | 2 | 4 | 6 |
| NA | 4 | 1 | 5 |
| NHNA | 4 | 1 | 5 |
| HNAC | 0 | 2 | 2 |
| HNA | 0 | 0 | 0 |
• Warren County population
24.1 mi, 
28°
• Marion County
41.5 mi, 
59°
• Madison County
24 mi, 
330°
• Union County
24 mi, 
269°
• Lucas County
23.6 mi, 
89°
• Decatur County
20.2 mi, 
180°
• Adair County
41.6 mi, 
299°
• Wayne County
30.9 mi, 
130°
• Ringgold County
31.5 mi, 
229°
• Mercer County
43.5 mi, 
164°
[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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