Last official estimated population of Osceola County was 6,451 (year 2014)[1]. This was 0.002% of total US population and 0.2% of total Iowa state population. Area of Osceola County is 399.4 mi² (=1034.4 km²), in this year population density was 16.15 p/mi². If population growth rate would be same as in period 2010-2014 (-0.04%/yr), Osceola County population in 2024 would be 6,424 [0].
Historical population of Osceola County for period 1880-2014 [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
[1880-1890] +9.65 %/yr
[1890-1900] +4.58 %/yr
[1900-1910] +0.26 %/yr
[1910-1920] +1.33 %/yr
[1920-1930] -0.04 %/yr
[1930-1940] +0.41 %/yr
[1940-1950] -0.41 %/yr
[1950-1960] -0.12 %/yr
[1960-1970] -1.61 %/yr
[1970-1980] -0.22 %/yr
[1980-1990] -1.4 %/yr
[1990-2000] -0.37 %/yr
[2000-2005] -0.75 %/yr
[2005-2010] -0.85 %/yr
[2010-2014] -0.04 %/yr
Looking for settlements in Osceola County? Visit this page: Settlements in Osceola County, IA
Population of Osceola County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 193 | 178 | 371 |
| 5 to 9 | 229 | 203 | 432 |
| 10 to 14 | 219 | 176 | 395 |
| 15 to 19 | 202 | 177 | 379 |
| 20 to 24 | 165 | 139 | 304 |
| 25 to 29 | 152 | 138 | 290 |
| 30 to 34 | 181 | 152 | 333 |
| 35 to 39 | 157 | 164 | 321 |
| 40 to 44 | 181 | 175 | 356 |
| 45 to 49 | 182 | 180 | 362 |
| 50 to 54 | 245 | 231 | 476 |
| 55 to 59 | 288 | 270 | 558 |
| 60 to 64 | 196 | 188 | 384 |
| 65 to 69 | 165 | 150 | 315 |
| 70 to 74 | 113 | 153 | 266 |
| 75 to 79 | 101 | 144 | 245 |
| 80 to 84 | 99 | 107 | 206 |
| 85+ | 78 | 147 | 225 |
Osceola 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 | 3097 | 3022 | 6,119 |
| WA | 3061 | 3001 | 6,062 |
| NH | 2906 | 2890 | 5,796 |
| NHWAC | 2870 | 2851 | 5,721 |
| NHWA | 2841 | 2834 | 5,675 |
| H | 240 | 182 | 422 |
| HWAC | 227 | 171 | 398 |
| HWA | 220 | 167 | 387 |
| TOM | 38 | 23 | 61 |
| BAC | 34 | 21 | 55 |
| NHAAC | 30 | 24 | 54 |
| AAC | 30 | 24 | 54 |
| NHTOM | 30 | 19 | 49 |
| IAC | 22 | 24 | 46 |
| AA | 20 | 20 | 40 |
| NHAA | 20 | 20 | 40 |
| NHBAC | 23 | 16 | 39 |
| NHIAC | 13 | 18 | 31 |
| BA | 16 | 9 | 25 |
| IA | 9 | 15 | 24 |
| HBAC | 11 | 5 | 16 |
| NHIA | 6 | 10 | 16 |
| HIAC | 9 | 6 | 15 |
| NHBA | 8 | 7 | 15 |
| HTOM | 8 | 4 | 12 |
| HBA | 8 | 2 | 10 |
| HIA | 3 | 5 | 8 |
| NA | 2 | 4 | 6 |
| NAC | 2 | 4 | 6 |
| HNAC | 1 | 4 | 5 |
| HNA | 1 | 4 | 5 |
| NHNA | 1 | 0 | 1 |
| NHNAC | 1 | 0 | 1 |
| HAAC | 0 | 0 | 0 |
| HAA | 0 | 0 | 0 |
• Sioux County population
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[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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