Last official estimated population of Keokuk County was 10,499 (year 2014)[1]. This was 0.003% of total US population and 0.3% of total Iowa state population. Area of Keokuk County is 579.9 mi² (=1502 km²), in this year population density was 18.10 p/mi². If population growth rate would be same as in period 2010-2014 (-0.03%/yr), Keokuk County population in 2025 would be 10,466 [0].
Historical population of Keokuk 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] +10.65 %/yr
[1860-1870] +3.89 %/yr
[1870-1880] +0.9 %/yr
[1880-1890] +1.16 %/yr
[1890-1900] +0.46 %/yr
[1900-1910] -1.65 %/yr
[1910-1920] -0.08 %/yr
[1920-1930] -0.91 %/yr
[1930-1940] -0.39 %/yr
[1940-1950] -0.91 %/yr
[1950-1960] -0.81 %/yr
[1960-1970] -1.05 %/yr
[1970-1980] -0.76 %/yr
[1980-1990] -1.05 %/yr
[1990-2000] -0.19 %/yr
[2000-2005] -0.94 %/yr
[2005-2010] -0.69 %/yr
[2010-2014] -0.03 %/yr
Looking for settlements in Keokuk County? Visit this page: Settlements in Keokuk County, IA
Population of Keokuk County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 306 | 342 | 648 |
| 5 to 9 | 333 | 292 | 625 |
| 10 to 14 | 374 | 307 | 681 |
| 15 to 19 | 323 | 301 | 624 |
| 20 to 24 | 277 | 254 | 531 |
| 25 to 29 | 241 | 217 | 458 |
| 30 to 34 | 311 | 284 | 595 |
| 35 to 39 | 280 | 262 | 542 |
| 40 to 44 | 290 | 270 | 560 |
| 45 to 49 | 293 | 270 | 563 |
| 50 to 54 | 398 | 427 | 825 |
| 55 to 59 | 434 | 392 | 826 |
| 60 to 64 | 369 | 330 | 699 |
| 65 to 69 | 267 | 286 | 553 |
| 70 to 74 | 228 | 236 | 464 |
| 75 to 79 | 151 | 205 | 356 |
| 80 to 84 | 144 | 193 | 337 |
| 85+ | 114 | 230 | 344 |
Keokuk 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 | 5083 | 5048 | 10,131 |
| NH | 5040 | 5023 | 10,063 |
| WA | 5047 | 5008 | 10,055 |
| NHWAC | 4997 | 4979 | 9,976 |
| NHWA | 4962 | 4943 | 9,905 |
| H | 93 | 75 | 168 |
| HWAC | 86 | 69 | 155 |
| HWA | 85 | 65 | 150 |
| BAC | 48 | 37 | 85 |
| NHBAC | 48 | 36 | 84 |
| TOM | 37 | 42 | 79 |
| NHTOM | 36 | 38 | 74 |
| IAC | 22 | 36 | 58 |
| BA | 31 | 23 | 54 |
| NHBA | 31 | 22 | 53 |
| NHIAC | 16 | 31 | 47 |
| AAC | 17 | 19 | 36 |
| NHAAC | 15 | 15 | 30 |
| AA | 9 | 15 | 24 |
| IA | 9 | 10 | 19 |
| NHAA | 7 | 11 | 18 |
| NHIA | 4 | 9 | 13 |
| HIAC | 6 | 5 | 11 |
| HIA | 5 | 1 | 6 |
| HAA | 2 | 4 | 6 |
| HAAC | 2 | 4 | 6 |
| HTOM | 1 | 4 | 5 |
| NAC | 1 | 0 | 1 |
| NHNAC | 1 | 0 | 1 |
| HBAC | 0 | 1 | 1 |
| HBA | 0 | 1 | 1 |
| HNAC | 0 | 0 | 0 |
| NA | 0 | 0 | 0 |
| NHNA | 0 | 0 | 0 |
| HNA | 0 | 0 | 0 |
• Johnson County population
38 mi, 
52°
• Wapello County
24.2 mi, 
211°
• Mahaska County
24.3 mi, 
269°
• Washington County
23 mi, 
90°
• Henry County
40.3 mi, 
126°
• Poweshiek County
30.6 mi, 
323°
• Jefferson County
24.7 mi, 
155°
• Iowa County
25 mi, 
12°
• Monroe County
42.1 mi, 
240°
• Van Buren County
41.4 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
*Washington Iowa Notes
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